Chapter 5: The Tiantai School¶

The preceding four chapters dealt with the first stage of Buddhism’s entry into China: translation, misreading, and the first attempts at correction. With this chapter, we enter the truly creative age of Chinese Buddhism. Several schools developed genuinely original philosophical systems from materials transmitted from India, each in a distinctly Chinese way. Tiantai is among the most philosophically profound.

I. Historical Origins of Tiantai¶

The traditional Tiantai lineage begins with Nāgārjuna as its Indian spiritual ancestor, then passes through Huiwen, active under the Northern Qi around the middle of the sixth century; Huisi (515–577); and Zhiyi (538–597), with whom a formal Chinese transmission took shape.

Huiwen

Huiwen is the most mysterious figure in the Tiantai lineage, with almost no reliable biographical evidence. Tradition says that while reading Nāgārjuna’s Great Treatise on the Perfection of Wisdom and Treatise on the Middle, he awakened on his own to the “three contemplations” (emptiness, provisional existence, and the middle), and transmitted them to Huisi. He left no writings; his thought is known principally through the accounts of Huisi and Zhiyi.¹

Huisi

Huisi (515–577), a northerner, practiced meditation in his early years and later encountered the southern Chinese tradition of Prajñāpāramitā learning, combining meditative practice with its doctrine. He clarified Huiwen’s “three contemplations” and formed a key link in Tiantai’s philosophical systematization. He was the first master explicitly to formulate the “Lotus samādhi,” holding that the Lotus Sūtra described both doctrine and a state realizable through meditation.

Zhiyi was Huisi’s most important disciple. At twenty-three he entered Mount Dasu in Guangzhou and took up study under Huisi; he later far surpassed his teacher and became Tiantai’s genuine founder.

II. Zhiyi and His Works¶

Life

Zhiyi (538–597), whose lay surname was Chen, came from Huarong in Jingzhou, present-day Hubei. Born into a gentry family, he became a monk at eighteen and initially studied at Guoyuan Monastery in Hunan. In the first year of the Tianjia era of the Chen (560), at the age of twenty-three, he went to Mount Dasu in Guangzhou to join Huisi, from whom he received the teaching. He subsequently constructed the Tiantai system independently.²

He was principally active in two places: Mount Tiantai in present-day Zhejiang and Jinling, present-day Nanjing and capital of the Chen dynasty in the south. On Mount Tiantai, he practiced in seclusion and developed his thought. In Jinling, he taught at the invitation of rulers and enjoyed very high social standing. He maintained close relations with the last Chen emperor and the future Emperor Yang of Sui, then Prince Yang Guang of Jin, and was honored as the “Master of Wisdom.”¹

The three great works

Zhiyi’s thought is concentrated in three major works, collectively called Tiantai’s “three great works.” All were transcribed and edited by his disciple Guanding.

III. The Five Periods and Eight Teachings: Establishing Doctrinal Classification¶

One important Tiantai contribution was a systematic “classification of teachings” covering the entire Buddhist canon. It arranged the different texts attributed to the Buddha’s lifetime by doctrinal depth and audience into levels and stages. The system is known as the “five periods and eight teachings.”

The five periods

The framework sought to solve a real textual problem: the Buddha was said to have taught many apparently contradictory things. Some texts criticized practitioners on the path of liberation, some praised the one vehicle, some taught emptiness, and some taught buddha-nature. How could they be reconciled? The five periods answer that they need not conflict. They are successive stages through which the Buddha guided people of different capacities at different times. The Lotus Sūtra is the final and most complete teaching, revealing the true intention of all that came before: opening up provisional teachings to reveal the real and relinquishing the provisional to establish the real.

The eight teachings

The eight are divided into four teachings concerning modes of instruction (sudden, gradual, secret, and indeterminate), and four concerning the doctrinal content taught:

The “perfect teaching” occupies the highest place in Tiantai classification. The perfect interpenetration of the three truths and three thousand realms in a single thought are its doctrinal core.

Significance and limitations of doctrinal classification

Doctrinal classification gave Chinese Buddhists an integrating framework for facing a vast canon. Yet the framework essentially organized all of the Dharma through Tiantai doctrine and projected Tiantai’s own position as “the Buddha’s highest meaning.” The Three Treatise master Jizang criticized this as establishing a new attachment; Huayan proposed another classification that placed the Avataṃsaka Sūtra at the summit.

Here the author wishes, exceptionally, to speak directly. This is the first appearance of “the author” in the body of this book, but the issue warrants breaking precedent.

The preface stated that we should see things as they are rather than distort them into what we wish them to be. The five-period classification is a good test of that principle.

When a theory facing adverse evidence begins to use ever more elaborate auxiliary hypotheses to protect its central conclusion, this is an intellectual danger signal. The historical premises of the five periods (the Avataṃsaka Sūtra being taught immediately after awakening, the Āgamas at the Deer Park, and so forth) have almost no support in textual history or archaeology. Yet when challenged, masters defending the framework often add another explanation: “It does not mean a historical sequence in time; it means the logical sequence of doctrinal depth.”

Where that explanation comes from must be established. The separation of the axis of doctrinal content from the axis of adaptation to the hearer is an original clause of Tiantai classification, not an ad hoc hypothesis manufactured after the fact under challenge. Having set up the eight teachings on the two axes of mode of instruction and doctrinal content, the Tiantai sijiao yi immediately writes a clause that clears its own account: “As for the secret and the indeterminate, the doctrinal content beneath those two teachings is nothing but the tripiṭaka, the shared, the distinct, and the perfect; the four modes of instruction end here.”³ The axis of instruction records the sequence and manner of the preaching and the structure of the returns won at one and the same assembly; whatever doctrinal content there is lies wholly within the four doctrines, the tripiṭaka, the shared, the distinct, and the perfect. Classification equals a grading of doctrine plus engineering for the hearer, and that ruling stands in Tiantai’s own introductory outline, set down in writing long before the later objections. Reading the five periods as an arrangement of pedagogical sequence rather than as a chronicle of the Buddha’s career is therefore Tiantai’s own reading.

Criticism on the side of historical fact is not thereby loosened, and a further warrant comes from the very simile the five periods borrow. The simile of the five flavours has its source in the Nirvāṇa Sūtra, and that same scripture, in its section on milk and cream, lays down a prohibition running both ways: one may not say that milk definitely possesses the nature of cream, and one may not say that milk definitely lacks it. It adds the simile of paper and ink forming graphs, saying that the paper originally has no graphs in it and that they are formed through borrowed conditions.⁴ By the scripture’s own stipulation, the succession of the five flavours is an order of conditioned formation, and no timetable lies stored in advance within any nature. Should Tiantai’s five periods be read as a fixed schedule for the disclosure of buddha-nature, the first thing they strike is that clause carried by the source simile; read as a pedagogical sequence fitted to capacity, they agree with it.

Perhaps we should reexamine the initial premise: is the Lotus Sūtra really the Buddha’s final and highest teaching? Chinese masters at the time had no way to know the scripture’s place in Indian textual history. It is a late Mahāyāna text, as Part IV explained. We live today in an information society where evidence for such judgments is accessible. Compared with our predecessors, should we not exercise more self-awareness?

Some say that “every theory is a Texas sharpshooter”: anyone can find evidence after the fact to support a conclusion, so all theories are equivalent and none should be taken too seriously. The author disagrees, because this falls into a lazy relativism. Theories differ in quality. Good theories revise themselves when challenged by evidence; bad theories generate ever more ad hoc clauses to preserve an unchanged conclusion. In this sense the five-period classification does have a real weakness, and the weakness must be located exactly. Entering the establishment of the first four periods wholesale under the head of adaptation to the hearer is the closing syntax that the classification carries with it; the Fahua xuanyi itself has “speech that follows the other’s intent,” and the four words opening the provisional to reveal the real gather up precisely that step. It was not produced by the challenge and does not count as an ad hoc clause. What cannot be falsified is the historical ordering of the five periods. That ordering is presented as the actual course of the Buddha’s career; nothing supports it but the pedagogical sequence Tiantai itself arranged, and the corresponding box on the side of textual history has stood empty throughout.

Saying so does not deny Tiantai’s genuine philosophical contributions. The perfect interpenetration of the three truths, three thousand realms in a single thought, and nature-inclusion will be treated seriously below. Doctrinal classification itself, however, is methodologically something that should have been abandoned long ago.

IV. The Perfect Interpenetration of the Three Truths: The Core Philosophical Framework¶

The Three Truths are Tiantai’s most important philosophical contribution and the key to understanding its thought. Upon the foundation of Nāgārjuna’s Madhyamaka, they constituted a distinctively Chinese Buddhist philosophical development.

The sources and meanings of the “middle way” in different contexts

Tiantai’s “truth of the middle,” or middle way, borrowed a term that had been used in Buddhism for a thousand years while continuously changing in meaning. We must first distinguish several usages to see what Tiantai inherited, developed, or constructed anew.⁵

First level: the middle way of early Buddhism (majjhimā paṭipadā). This usage appears among the Buddha’s earliest teachings. In the Discourse on Setting the Dhamma Wheel in Motion, the Buddha described to the five monks the “middle way” he had discovered: neither self-mortification nor sensual indulgence, but the path between those extremes—the Noble Eightfold Path. In the Kaccānagotta Sutta (SN 12.15), the “middle way” acquired a second meaning: standing upon the right view of dependent origination between the extremes “everything exists,” or eternalism, and “nothing exists,” or annihilationism. This use is ontological rather than a description of practice. Both usages are negative: they avoid two extremes and travel between them, but the “middle” itself is given no positive substantial content.

Second level: Nāgārjuna’s middle way (mādhyamika). Nāgārjuna developed the middle way into a systematic analytical instrument. The full title of the Mūlamadhyamakakārikā is “Fundamental Verses on the Middle Way.” Its core is the use of reductio to show that every proposition attempting to determine the “mode of existence” of things—whether “they exist” or “they do not exist”—falls into contradiction. The middle way is therefore not “a state between existence and nonexistence.” It is a cognitive posture that does not characterize phenomena through any ontological determination. This is thoroughly negative: it negates “is,” “is not,” “both is and is not,” and “neither is nor is not.” All four alternatives are rejected. “Middle” means “apart from the two extremes”; it is not itself a third entity.

Third level: Tiantai’s truth of the middle. When Zhiyi cited the famous verse from the Treatise on the Middle (“Whatever phenomena arise from conditions, I declare to be emptiness; they are also provisional names; this is also the meaning of the middle way”), he set “the middle” up as one truth standing alongside emptiness and the provisional, the three simultaneously present and mutually interpenetrating. Zhiyi himself laid down a limit on the scope of the truth of the middle. Glossing the term “not different” in the first fascicle of the Fahua xuanyi, he writes: “It is not that apart from emptiness and existence there is, besides, a separate middle way; that is why it is said to be not different.” A sentence of his own estimate follows: “This too agrees with Nāgārjuna’s intent.”⁶ The truth of the middle therefore acquires no third domain of objects outside emptiness and the provisional. The Three Truths are a threefold statement of one and the same dependently arisen phenomenon: emptiness is its rejecting face, the provisional its establishing face, and the middle the joint name of the two.

What Tiantai advances here falls on the grammar of the Three Truths. The threefold contemplation set up in the fifth fascicle of the Mohe zhiguan runs entirely on the quantifiers “one” and “all”: if one phenomenon is all phenomena, that is the contemplation of the provisional; if all phenomena are one phenomenon, that is the contemplation of emptiness; and what is neither one nor all is the contemplation of the middle. Each contemplation carries its own exclusion clause, “when one is empty all is empty, and there is neither provisional nor middle that is not empty”; three universal operators sweep across one and the same domain.⁷ Perfect interpenetration becomes intelligible on that basis. The Three Truths do not divide three domains of objects between them; they are three readings upon a single domain.

To enshrine the truth of the middle as a wonderful substance standing outside emptiness and existence and performing no function is a reading that has a name and a rank in Tiantai’s own tables. Above the five kinds of two truths, the second fascicle of the Fahua xuanyi sets up five kinds of three truths. In the three truths of the distinct entering the shared, “the middle discussed within that teaching differs from emptiness and no more; the middle there has no function and is not furnished with the phenomena”; in the three truths of the distinct teaching, “the real is opposed by the middle, and the middle is principle and nothing further”; only in the three truths of the perfect teaching is it the case that “not only is the middle way furnished with the Buddha’s teachings; the real and the conventional are so as well. The three truths are perfectly interpenetrating, one is three and three is one.”⁸ A truth of the middle read as an independent wonderful substance bears, in Tiantai’s own nomenclature, the name “exclusive middle,” and it is assigned to the distinct teaching; the perfect gate does not admit it. Among the later masters there really were readings of that kind, and they belong on the side of the history of reception; at the point of legislation Zhiyi’s own text supplies a footnote that blocks them.

The divergence between Huayan and Tiantai is not settled by this point. The actual boundary between the two perfect teachings lies between nature-inclusion and nature-origination: Tiantai enters both good and evil under the head of nature, while Huayan enters pure function only and assigns defilement to the side of deluded conditions (Chapter 10.6).

The concrete content of the Three Truths

Zhiyi explicitly traced the Three Truths to verse 18 of Chapter 24 of Nāgārjuna’s Treatise on the Middle in Kumārajīva’s translation:

Whatever phenomena arise from conditions, I declare to be emptiness—the truth of emptiness; they are also provisional names—the truth of provisional existence; this is also the meaning of the middle way—the truth of the middle.

Zhiyi’s creativity lay in reading the verse’s three layers, emptiness, the provisional, and the middle, as three truths simultaneously present and mutually interpenetrating, and in requiring the threefold contemplation in one mind to contemplate all three together within a single thought. The division of labour among the Three Truths is written into the direction taken by the quantifiers “one” and “all,” not into three separate objects.⁹

Perfect interpenetration of the Three Truths

“Perfect interpenetration” expresses the relation among the Three Truths. They do not advance sequentially—first understanding emptiness, then the provisional, and finally the middle. They are simultaneously present and mutually included.

To understand one truth is simultaneously to understand all three. Understanding emptiness means understanding that emptiness is discovered on the basis of provisionally named existence, and at the same time understanding the middle-way balance between emptiness and provisional existence. The Three Truths are three aspects of the same reality. At the moment of cognition, all three are seen together rather than realized one after another.

This differs from Madhyamaka at one real point. Its two truths, especially in Prāsaṅgika, are different levels of analysis and do not “perfectly interpenetrate,” whereas Tiantai lists the middle way separately as one truth, sets it beside emptiness and the provisional, and requires that the three be seen together within a single thought. The difference falls on the number of the truths and on the manner of seeing them; the content assigned to the middle way itself is unchanged.

Tiantai’s relation to the tathāgatagarbha tradition must be stated by levels. On the side of vocabulary, tathāgatagarbha language is genuinely present in Tiantai: the first of the six identities in its ranking of stages, identity in principle, is stated in the first fascicle of the Mohe zhiguan as “identity in principle means that a single thought of mind is the principle of the tathāgatagarbha.” On the side of legislation, Zhiyi convened the Northern and Southern dispute over what supports what, in the fifth fascicle of the Mohe zhiguan, and settled it on the spot. The Dilun masters made dharma-nature the support; the Shelun masters made the ālaya the support; Zhiyi ruled that “these two masters each rely upon one side,” dismantling entire the premise the two parties shared, namely that between one dharma and another a supporter must first be posited, and writing expressly that “neither is it said that the one mind is prior and all dharmas posterior.”⁷ Modern and contemporary Japanese “Critical Buddhism” directs its criticism of tathāgatagarbha and original-awakening thought (Chapter 12.3) at a structure in which a permanent substratum generates the myriad phenomena. Tiantai took over the vocabulary of the true-and-permanent line while removing that line’s posited supporter at the point of legislation, and the two matters must be assessed separately.

V. Three Thousand Realms in a Single Thought: An Inventory, Neither Vertical nor Horizontal¶

“Three thousand realms in a single thought” is the concept that most fully displays Tiantai’s characteristic mode of thought.

The source of the three thousand realms

“Three thousand” results from multiplying three sets of factors.

The Ten Dharma Realms are hell beings, hungry ghosts, animals, asuras, humans, gods, śrāvakas (disciples on the liberation path), pratyekabuddhas, bodhisattvas, and buddhas. They represent every possible mode of existence. Each of the ten mutually contains the other nine, yielding one hundred.

The Ten Suchnesses, derived from the Lotus Sūtra, are suchness of appearance, nature, substance, power, activity, cause, condition, result, recompense, and the ultimate equality of beginning and end. These ten aspects describe ten dimensions of the state of existence of every phenomenon.

The Three Kinds of World are the world of sentient beings, the embodied and mental world composed of the five aggregates, and the world of lands or external environments.

One hundred × ten × three = three thousand.

The philosophical meaning of three thousand realms in a single thought

The text that lays the doctrine down stands in the section of the fifth fascicle of the Mohe zhiguan on contemplating the inconceivable object:

One mind possesses the ten Dharma Realms, and each Dharma Realm possesses in turn the ten Dharma Realms, making a hundred Dharma Realms; one realm possesses thirty kinds of world, and the hundred Dharma Realms accordingly possess three thousand kinds of world. These three thousand are in a single thought of mind. If there is no mind, there is an end of it; but let there be the least stirring of mind, and it possesses the three thousand.

Zhiyi then fenced the relation between the single thought and the three thousand with two prohibitive clauses. To read all phenomena as produced out of one mind he judged vertical; to read mind as containing all phenomena at one time he judged horizontal; barring the vertical and the horizontal together, he wrote in addition that “neither is it said that the one mind is prior and all dharmas posterior.”¹⁰ Later usage commonly describes three thousand realms in a single thought as “simultaneously present,” and that description falls exactly on the horizontal side, which he barred. By the stipulation of the original text, three thousand realms in a single thought says that at the site of the present thought three thousand classifications can all be pointed to at once. Complete presence refers to the completeness of the classification, not to three thousand things being held at one time within a single thought of mind.

The claim has several implications. First, no state of existence is entirely isolated. Each present thought possesses an internal relation to all three thousand possible modes of existence. Second, practice is not a movement “from low to high through each realm in succession.” At every moment it is already related to every realm. Hell and Buddhahood do not occupy two remote extremes; the places of the two realms can equally be pointed to at the site of every moment of thought.

Third, the idea implies that “buddhas possess evil in their nature.” The ten Dharma Realms stand on the inventory at every moment of thought, and a buddha’s thought is no exception; the places of hell, hungry ghosts, and the rest therefore cannot be struck from a buddha’s nature, and the buddha accordingly possesses “hell-nature” and the quality of “evil.” This is precisely the philosophical foundation of Tiantai’s theory of nature-inclusion.⁹

Taking stock of what is delivered

The number three thousand is obtained by multiplication, and each of the three axes is a finished product of earlier texts: the Ten Dharma Realms come from common doctrine, the Ten Suchnesses from Kumārajīva’s rendering, and the Three Kinds of World from the Treatise on the Great Perfection of Wisdom. What multiplication yields is scale; the argument does not lie in the step of multiplying. One further item on the side of the inventory must be recorded as it stands. A list can carry differences only because some of its boxes are filled and some are empty, and the three thousand have no empty box by construction: under the mutual inclusion of the ten realms all three thousand places stand filled at any moment of thought and not one is marked absent, and a register filled to the last box registers no difference. Look at the side of mechanism as well. How karmic result continues across time, where memory is lodged, what carries rebirth-linking, what sustains mind in the attainment of cessation, and where defiled and pure seeds are carried along: these five questions make up the task list that Consciousness-Only established the ālaya to take on (Chapter 6.2). Three thousand realms in a single thought takes on not one of them; it returns the five questions whole.¹¹

After the stocktaking, what the doctrine actually delivers comes to three items. First, the mutual inclusion of the ten realms is a clause against fixing natures: the places of sentient beings and of buddhas are not closed off, every place communicates with every other, and Tiantai used this to meet the Faxiang doctrine of five distinct lineages head-on (Chapter 10.7). Second, the joint barring of vertical and horizontal, together with the dismantling of the dispute over what supports what, is a genuine argument, and its target is the premise that between one dharma and another a supporter must first be posited (see Section IV). Third, the three thousand taken as object contemplated set up the opening move of perfect-and-sudden calming and contemplation (see Section VII). The item promised by the words themselves, a positive mechanism for how the myriad phenomena are established, is not on this list.

VI. The Theory of Nature-Inclusion: Buddhas Possess Evil in Their Nature¶

The theory of nature-inclusion is Tiantai’s most original philosophical claim developed from the tathāgatagarbha tradition. Chapter 7.4 introduced it; here we unfold its philosophical content.

The central claim of nature-inclusion

The mainstream tathāgatagarbha position, discussed in Chapters 7.1 and 7.2, holds that the nature of mind is originally pure and that defilements and evil are adventitious “dust,” not part of its essence. Practice removes the dust and reveals the mind’s original purity.

Tiantai’s nature-inclusion theory fundamentally revised that mainstream position. The nature of mind, tathāgatagarbha or buddha-nature, originally includes every possibility of both good and evil. It no longer says, “originally pure, then defiled,” but claims that good and evil are both intrinsically present within nature. This is entirely different from the tathāgatagarbha explanation of adventitious defilement.¹²

Buddhas possess evil in their nature

The theory’s most striking implication is that “buddhas possess evil in their nature.” The tathāgatagarbha or Dharma-body of a buddha equally contains “evil by nature.” A buddha does not practice evil (does not actualize its possibility), but that possibility is intrinsically present in the buddha’s nature.

This solves tathāgatagarbha’s old problem of “how can defilement be possible if mind is originally pure?” There is no need to explain how defilement entered an originally pure mind from outside, because good and evil were both already internal possibilities of mind-nature.

It further means that practice does not consist in “removing evil and retaining good,” but in “knowing good and evil alike as manifestations of immovable suchness and clinging to neither extreme.” This is the central difference between the theory of nature-inclusion and Huayan’s theory of nature-origination, discussed in Chapter 10.6. Huayan says, “the myriad phenomena arise from the nature of the one mind.” Tiantai says, “the myriad phenomena, including good and evil, are originally included in the one mind.” Their starting points and directions differ.

Insentient things possess the nature: Zhanran’s test of consistency

In the eighth century the question of the range of nature-inclusion was pushed beyond sentient beings. Zhanran (711–782), who revived Tiantai, argued in the Jin’gang bei that insentient things too possess buddha-nature, and the ground he took was the Huayan doctrine of following conditions while remaining unchanged. He marked the source himself: “The doctrine of following conditions while remaining unchanged comes from the great teaching; the saying that wood and stone have no mind arises from the lesser tenets.” The form of the argument is a test of consistency: “The myriad phenomena are suchness, because it is unchanging; suchness is the myriad phenomena, because it follows conditions.” To grant following conditions while remaining unchanged and yet confine buddha-nature to the sentient is, on Zhanran’s ruling, self-contradiction.¹³

Where Zhanran’s refutation lands must be established. In its gate on the general and the particular, Fazang’s Huayan jing tanxuan ji had already written that nature-origination “pervades the insentient as well,” drawing its range out as far as insentient things. The one who narrowed that range was Chengguan (738–839). The Suishu yanyi chao devotes a passage to blocking the doctrine that insentient things possess buddha-nature, and the correct sense it establishes reads: “Nature and characteristic are neither identical nor different, and the sentient and the insentient are likewise neither identical nor different.” Huayan does have a doctrine of the insentient attaining buddhahood, but “this does not mean that insentient things too possess an awakened nature and attain buddhahood as the sentient do.”¹⁴ What Zhanran refuted was Chengguan’s narrowing; the range Fazang had drawn agrees with Zhanran’s own claim.

The price of the narrowing can be calculated. Chengguan set the word “knowing” up alongside nature, saying that “knowing is the substance of mind,” and drew the line between the sentient and the insentient with the phrase “unlike wood and stone.” Knowing requires one who knows, and insentient things are thereby pushed outside the range. If the nature in nature-origination is no more than the principle of the absence of intrinsic nature, pervading the insentient meets no obstacle at all, because whether that principle holds has nothing to do with whether its object has a mind. By taking numinous knowing, Chengguan gave up Fazang’s upper limit on the range; that one concession and one acquisition is a measurable link in the drift running from Fazang through Chengguan to Zongmi over three generations (Chapters 10.6 and 7.4).

VII. The Great Calming and Contemplation: Practice¶

The Great Calming and Contemplation is the most systematic theoretical work on meditation in Chinese Buddhist history. “Great” translates mahā, while “calming and contemplation” translate śamatha (settling the mind) and vipaśyanā—the insight of wisdom.

Four kinds of samādhi

The work establishes an overall framework of four kinds of samādhi, adapted to practitioners of different capacities and ways of life:

The fourth, “neither walking nor sitting,” is the most distinctly Sinicized form of Tiantai contemplation. It extends meditation into every moment of daily life, rather than restricting it to a particular time and posture of seated meditation. Chan carried “walking, standing, sitting, and lying down are all meditation” to its fullest conclusion, but Tiantai had already given the idea an ample theoretical basis.

The ten modes of contemplation and the inconceivable realm

The practical core of the Great Calming and Contemplation is the “ten modes of contemplation”: ten progressive steps beginning from “contemplating the inconceivable realm” (directly observing the suchness of the present thought), and passing through various stages until the practitioner realizes the complete state of calming and contemplation.

The “inconceivable realm” is the most important object of Tiantai practice. It means the present thought, at whose site all three thousand classifications stand on the inventory, and which is at once empty, provisionally designated, and the middle. Taking this present thought as the object of observation means entering directly into contemplation of the perfect interpenetration of the Three Truths.

The six identities: a double guard on the ranking of stages

Perfect-and-sudden calming and contemplation compresses the ladder of doctrine into a single step, describing itself as taking “the real aspect as its object from the outset, so that the object it reaches is the middle and nothing is not real”; the ladder of stages is then rebuilt on the spot at the six identities. Zhiyi states his reason for setting them up in the first fascicle of the Mohe zhiguan: they block misreadings in two directions.

If wisdom and faith are both complete, one hears that a single thought is it. Because of faith one does not slander; because of wisdom one is not afraid; and beginning and end are alike it. Without faith, one pushes the realm of the sages up on high as no portion of one’s own wisdom; without wisdom, one gives rise to overweening pride and says that one is equal to the Buddha; and beginning and end are alike not it. For this reason one must know the six identities: identity in principle, identity in name, identity in the practice of contemplation, identity in resemblance, identity in partial realization, and identity in ultimacy. These six identities begin in the ordinary and end in sagehood. Because they begin in the ordinary, doubt and timidity are removed; because they end in sagehood, arrogance and grandiosity are removed.

The two clauses are a pair, each guarding one end. At the end without faith, what the perfect-and-sudden teaching says about the present moment is pushed up into the realm of the sages as no portion of one’s own capacity, and the inherent possession of principle falls away. At the end without wisdom, the identity that holds at the level of principle is read as arrival at the level of stage, one says that one is equal to the Buddha, and the sequence of stages is usurped. Among the six, identity in principle stands before any hearing of the teaching, and its text has already appeared in Section IV; identity in name begins with hearing: “though in principle it is it, one does not know it in daily use … like the eyes of oxen and sheep, which cannot make out the quarters.” The word “identity” secures sameness along the horizontal, and the six stages secure sequence along the vertical, so that a teaching of one step furnishes itself with six grades of stage. This scheme belongs to the perfect teaching alone, as Zhiyi notes himself: “When one contemplates all phenomena perfectly, one speaks in every case of the six identities. Hence, taking all phenomena in the perfect sense, one uses the six identities throughout to rank the stages.” The six identities are accordingly a ladder of ranking reserved for the perfect teaching, and the tripiṭaka, shared, and distinct teachings do not use it.¹⁵

The contemporary condition of Tiantai contemplation

The living transmission of Tiantai contemplation has declined almost completely in the modern period. After the Song dynasty, Chinese Buddhist practice shifted toward Chan investigation of the critical phrase and Pure Land recollection of the Buddha. As living systems of practice, Tiantai’s ten modes of contemplation and four kinds of samādhi almost disappeared from everyday religious life. Mario Poceski’s research shows that the term “calming and contemplation” appears extremely rarely in Song transmission-of-the-lamp literature and almost entirely as a literary allusion rather than as a description of actual practice. It occurs only seventeen times in the full thirty fascicles of the Jingde Record of the Transmission of the Lamp. Japanese Tendai became highly esoteric from the ninth century onward, and its everyday practice replaced contemplation with ritual and esoteric methods. A scholar-monk of contemporary Chinese Tiantai has lamented that “the way of calming and contemplation is unheard of in the world,” and transmission in the sense of actual practice is extremely limited.¹⁶

Yet one phenomenon is worth noticing. When Chinese Mahāyāna Buddhists are criticized for neglecting actual practice and lacking a foundation in concentration, Tiantai contemplation is often invoked as a shield: Chinese Buddhism, the response goes, possesses a complete system of calming and contemplation and therefore cannot be dismissed as “lacking a tradition of practice.” What is cited is a theory that has almost vanished from actual religious life. It is invoked not to promote practice, but to find an item that cancels the criticism.

The maneuver is structurally isomorphic with the logic of doctrinal classification examined above. Whenever challenged, doctrinal classification generates a new reason that dissolves the challenge. Here, faced with “you do not actually practice,” the response produces “we possess a theory of contemplation.” Both use the existence of an explanation to resist a question about actual conduct rather than answer it directly.

VIII. The Home-Mountain and Off-Mountain Controversy¶

During the Song dynasty, a dispute extending over several decades erupted within Tiantai, known as the “Home-Mountain and Off-Mountain controversy.” Its central question was: what exactly should Tiantai calming and contemplation take as its object?

The Home-Mountain position of Zhili

Zhili (960–1028) was the central figure of the Northern Song Tiantai revival and represented the “Home-Mountain,” or mountain-orthodox, position. He argued that the object of contemplative practice is the deluded mind—the actual state of the ordinary person’s thought in daily life, the present thought carrying defilements and attachment.¹²

The reasoning was that practice can take place at the most immediate point, and the perfect interpenetration of the Three Truths can be seen in the present, only by taking the actually occurring deluded mind as its object. Hell-nature and buddha-nature are simultaneously present in that deluded thought. Avoiding the actual condition of the ordinary person’s thought to pursue an imagined “pure mind” is a shortcut that evades practice.

The Off-Mountain position

The Off-Mountain side argued that contemplative practice should take the pure true mind as its object and not select defiled delusion. Would taking the deluded mind as the object not mean observing the wrong thing? The aim of contemplation should be direct observation of the pure essence of mind-nature.

This position was closer to the mainstream tathāgatagarbha tradition: the nature of mind is originally pure, and practice returns to that pure original mind rather than following deluded thoughts.

Philosophical significance of the dispute

The controversy was effectively a conflict between two tendencies within Tiantai. One, represented by Zhili, carried through to its conclusion the position that “nature includes good and evil, and the deluded mind is the very site of the true mind.” The other returned toward the mainstream tathāgatagarbha view of “the original purity of mind-nature.”

Zhili won later dominance within the Tiantai transmission, and “Home-Mountain” became a synonym for Tiantai orthodoxy.

Cutting off the nine realms in favour of principle: Zhili’s challenge to Huayan

Zhili’s position on nature-inclusion was also turned outward. In the Shibuermen zhiyao chao he laid a charge against the Huayan line which he called cutting off the nine realms in favour of principle: if the principle taken as object is pure and nothing else, the defilement of the nine realms has no place to be lodged within nature, and attaining buddhahood must then proceed by cutting off the nine realms first and arriving afterwards. The charge is stated twice. Once in his discussion of contemplation: “If one discards the mind of the aggregates and contemplates the true nature by itself, one falls squarely under the censure of one-sidedly pointing to pure suchness, and incurs besides the ridicule of cutting off the nine realms in favour of principle.” And once with its referent named: “Moreover, the term numinous knowing is used exclusively by Guifeng; since it is not shown as identical with the aggregates, and has no marks of cultivation and manifestation either, it is precisely a one-sided pointing to pure suchness, and belongs only to the true mind and to the sense of cutting off the nine realms in favour of principle.” The correct sense of the word “cut” is given in the same work: “Affliction and birth-and-death are the nine realms; and since a teaching is called perfect only when the ten realms include one another, how could a buddha destroy the nine or turn the nine away? … Hence the perfect house discusses cutting and realizing, delusion and awakening, by defiled and pure only, and not by good and evil or clean and unclean.” The specific indictment of Huayan falls in one sentence: “Hence one knows that the other school, at its most perfect, says only nature-origination and does not say nature-inclusion.” Zhili also records the alarm of his contemporaries: “When people of the age see me hold that the principle of the distinct teaching has the sense of following conditions, their ears are startled and their minds are shaken.”¹⁷

The verdict on this suit, following the hearing in Part 22, Chapter 5 of the second division, falls in three layers. First, the charge does not hold against Fazang’s own legislative text. The gate on the defiled and the pure in the Tanxuan ji sets its own question, asking whether sentient beings and afflictions belong to nature-origination, and answers “they all are,” the reasons given being that they are what is to be saved, what is to be cut off, and what is to be known; the gate on the general and the particular writes that nature-origination “pervades the insentient as well”; and in the Huayan texts the operation of cutting takes deluded conditions for its object, so that the nature of the nine realms is nowhere sentenced to death (Chapter 10.6). Second, the charge does hold on the side of the history of reception. Discarding the mind of the aggregates, contemplating the true nature by itself, and a numinous knowing without marks of cultivation and manifestation answer item for item to the drift toward a doctrine of mind from Chengguan onward, and Zhili himself named the referent: the term numinous knowing is used exclusively by Guifeng. Third, the legislation of each party rests securely within what that party has posited, and the disagreement gathers at last into two disputes about wording. One is a dispute over how wide the register of nature is drawn: Tiantai enters both good and evil as gates of the teaching, while Huayan enters pure function only and places defilement in the position of what is to be counteracted. The other is a dispute over how tightly the word “identity” is construed: Fazang says identity by way of emptiness and existence yielding place to each other, while Zhili says that “only when the very substance is wholly it is it called identity.” The two operational definitions run in opposite directions, and each founds a school. Registers and grammar may be argued for precedence; they do not carry an indictment at the level of ontology.¹⁷

This suit is also worth a note for its place in the sequence. A charge of the same shape was brought again in the twentieth century by Japanese “Critical Buddhism” (Chapter 12.3, and see Section IV). Zhili’s hearing came nine hundred years earlier, and the plaintiff, the defendant, the original texts, and the verdict all survive in the literature, so its evidentiary base is harder than that of the modern case.

Viewing the controversy from the Āgamas

The Home-Mountain and Off-Mountain controversy was serious within Tiantai’s internal logic. Both sides addressed the question “what is the genuine object of contemplation?” with care. Zhili’s claim that “the deluded mind itself contains the three thousand realms” preserved the consistency of nature-inclusion and possessed philosophical force. Yet something should be said directly. The Pāli discourses and Chinese Āgamas both offer clear, operationally usable foundational descriptions relevant to the questions the two parties debated concerning whether contemplation should observe the deluded or true mind. Even where not identical word for word, they supply sufficient directional guidance. The Mahāsatipaṭṭhāna Sutta, Ānāpānasati Sutta, and standard descriptions of the four jhānas, quoted in detail in Part I, are maps of practice verified by successive generations of practitioners. Practitioners can test whether their condition matches the descriptions in the texts.¹⁸

Tiantai’s ten modes of contemplation, inconceivable realm, and four kinds of samādhi, by contrast, were a system independently constructed by Zhiyi within a Chinese Mahāyāna context. Its principal textual bases include the Lotus Sūtra’s Ten Suchnesses and Mahāyāna tathāgatagarbha scriptures—historically late texts, as Part IV explained. Its descriptions of practice have undergone far less independent verification than those of the Āgamas.

The Home-Mountain and Off-Mountain parties debated “which mind should be observed.” Within the framework of the Āgamas, however, the question need not arise. The objects are presently arising and ceasing embodied and mental phenomena (breathing, feeling, mind, and phenomena), and the method is continuous awareness. There is no need first to decide whether this mind is “deluded” or “true.” The entire Tiantai debate occurs within a particular set of Mahāyāna metaphysical assumptions: mind-nature contains three thousand realms and delusion must be distinguished from truth. These assumptions were not generalized from practical experience. They came from doctrinal inference and were then used to organize practice.

This book does not judge Tiantai contemplation to be “necessarily wrong.” Some people have benefited from it historically, and that fact cannot be denied. What this book points out is that the system lacks a sufficiently firm foundation: it first establishes metaphysics (the Three Truths and nature-inclusion), and then attaches contemplation to it. Āgama-based calming and insight begin from repeatedly tested practice and only afterward construct doctrine around it. Their epistemic directions are opposite. When Home-Mountain and Off-Mountain masters devoted great effort to debating “whether the deluded or true mind should be observed,” perhaps the place more worthy of their attention was the clearly written guidance on practice in the Āgamas.

IX. Historical Influence¶

In China

Tiantai possesses the most complete philosophical system among Chinese Buddhist schools. Its three central concepts (the perfect interpenetration of the Three Truths, three thousand realms in a single thought, and nature-inclusion) can be compared with Indian Consciousness-Only and Madhyamaka in philosophical sophistication, yet they are thoroughly Sinicized creations without direct sources in Indian texts.

Tiantai’s influence penetrated almost every other Chinese Buddhist tradition. Chan’s “this very moment is it” bears the trace of three thousand realms in a single thought. Some Pure Land theories borrowed Tiantai doctrine. Debates between Huayan and Tiantai over nature-origination and nature-inclusion drove both sides toward more precise elaborations of their positions.

In Japan

Saichō (767–822), the posthumous Dengyō Daishi, transmitted Tiantai to Japan as Tendai, centered at Enryakuji on Mount Hiei. Tendai became one of the most important Buddhist schools of the Heian period. Many leading figures in later Japanese Zen, Pure Land, and Nichiren traditions began within Tendai.

X. This Book’s Philosophical Assessment¶

Tiantai is the Chinese Buddhist tradition whose doctrinal creativity most demands serious treatment. This book offers several direct judgments.

The contribution of the perfect interpenetration of the Three Truths is genuine. Integrating Nāgārjuna’s three dimensions of emptiness, provisional existence, and the middle as simultaneously present and mutually interpenetrating truths cannot be reduced to “misreading” or “elaboration.” It is an internally coherent philosophical construction on a Madhyamaka doctrinal basis. Zhiyi himself set a limit on the truth of the middle, “it is not that apart from emptiness and existence there is, besides, a separate middle way,” and entered his own estimate that this agrees with Nāgārjuna’s intent; measured at the legislative text, the distance between the Tiantai reading and Madhyamaka is smaller than is usually supposed. The risk lies on the side of the history of reception: later masters enshrined the truth of the middle as an independent wonderful substance, and that reading bears the name “exclusive middle” in Tiantai’s own tables, where it is assigned to the distinct teaching.

What three thousand realms in a single thought delivers must be counted honestly. The three thousand are obtained by multiplying three ready-made axes of classification; what multiplication yields is scale, and the argument lies elsewhere. Two things are actually delivered. The mutual inclusion of the ten realms is a clause against fixing natures, aimed squarely at the Faxiang doctrine of five distinct lineages; and the joint barring of vertical and horizontal, together with the dismantling of the dispute over what supports what, is a genuine argument whose target is the premise that between one dharma and another a supporter must first be posited. As for a positive mechanism of how the myriad phenomena are established, three thousand realms in a single thought takes on nothing of the kind and returns the question whole to the practice of contemplation.

Nature-inclusion is more honest than mainstream tathāgatagarbha. The model “originally pure but adventitiously defiled” has never been able to explain the origin of defilement, the old problem discussed in Chapter 7.2. Nature-inclusion directly acknowledges good and evil as internal possibilities of nature and is logically more consistent than “adventitious defilement.” The cost is the intuitively difficult conclusion that “buddhas possess evil in their nature.” This book judges the cost worth paying, because it avoids a greater philosophical contradiction.

Tiantai’s limitation lies in doctrinal classification. The five periods and eight teachings organize the whole Dharma through Tiantai’s own “perfect teaching.” The theory is circular: Tiantai uses its own framework to prove that its own framework is supreme. Half of Tiantai’s self-checking clause is present, in that the perfection of the perfect teaching has non-partiality for its sense, and perfect interpenetration is itself an operating rule against holding the truths apart rather than a new domain of objects. The other half, whether the position at the perfect summit can itself still be classified, the original text nowhere addresses. The circle exists in every system of doctrinal classification and is a methodological problem that cannot be completely solved.

References¶