Zhiyi

Chinese Buddhists inherited a problem that Indian Buddhists never had in the same form. The scriptures arrived out of order, over four centuries, in translations of uneven quality, and they contradicted each other. The Buddha of one sutra says the goal is individual liberation; the Buddha of another says that goal is provisional. Since all of them were held to be his words, the contradictions had to be arranged rather than resolved.

Zhiyi's answer, the classification of the teachings, is the most influential solution anyone produced. He read the discrepancies as pedagogy: the Buddha taught differently at different stages of his career and to hearers of different capacity, so the canon records a curriculum rather than a set of competing positions. The scheme is conventionally summarised as five periods and eight teachings, sorting the scriptures both by when they were delivered and by the method and content of the delivery. The Lotus Sutra sits at the summit as the teaching in which the earlier provisional forms are acknowledged as provisional and gathered up.

The historical chronology is wrong, as everyone now knows: the sutras were not composed in that order and the periods are a construction. What the scheme did was let a reader hold the whole canon at once without discarding any of it, and give a principled reason for ranking. Every later East Asian school that claims a supreme scripture is arguing on ground Zhiyi laid out.

The Mohe zhiguan is a manual, and its subject is the pair of practices its title names. Zhi is the stilling of mental movement, the settling of attention; guan is the discernment that operates once things are still. Zhiyi treats them as inseparable, two wings rather than two stages, and the book works through the preparations, the postures, the obstacles, the illnesses that arise, and the states that can be mistaken for attainment.

Underneath the practical instruction lies the doctrine the school is known for. The threefold truth holds that every phenomenon is at once empty of independent existence, provisionally real as a conventional designation, and, in the very fact that both statements hold together, the middle. These are not three levels to be climbed but three aspects of a single perception. From this follows the formula of three thousand realms in a single moment of thought: every possible mode of existence, from the hells to buddhahood, is present in whatever thought is occurring now, so nothing has to be acquired from elsewhere.

The consequences are practical rather than speculative. If buddhahood is not somewhere else, then meditation is not a journey but a recognition, and there is no realm of experience, however degraded, that lies outside practice. Later Tiantai thinkers drew from this the conclusion that even a buddha retains the potential for evil, a position that startled other schools and that follows directly from taking the doctrine seriously.