QUESTION: Why is the Wonderful Dharma called the “three thousand existences contained in one thought”?

ANSWER: Grand Master T’ien-t’ai, after perceiving the “three thousand existences contained in one thought” doctrine, expounded many teachings such as the Profound Meaning of the Lotus Sūtra (consisting of ten fascicles); the Words and Phrases of the Lotus Sūtra (consisting of ten fascicles); the Samadhi of Bodhicitta; the Shōshi-kan (Introduction to Meditation); the Annotations on the Vimalakirti Sūtra; the Commentary on How to Eliminate Four Misconceptions of Body, Feeling, Mind, and Self; and the Annotations on the Doctrine of the Dhyānapāramitā; without explaining the “three thousand existences contained in one thought” doctrine. What he expounded were only the Ten Realms, the Hundred Realms, and the Thousand Aspects. However, there exists the Great Concentration and Insight, ten fascicles, which he expounded to a disciple, Grand Master Chang-an, in the summer of the fourth month when he was fifty-seven years old, at the Yü-ch’üan-ssŭ Temple in Ching-chou. What he wrote in the first four fascicles was only concerned with such doctrines as the Six Stages in the practice of the Lotus Sūtra and Buddhahood, the Four Kinds of Meditation, and not the “three thousand existences contained in one thought” doctrine. Beginning with the fifth fascicle, however, he discusses the Ten Objects Ten Stage Meditation, revealing the “three thousand existences contained in one thought” doctrine for the first time. Grand Master Miao-lê recommended this to people of the Latter Age of Degeneration, saying in his Annotations on the Great Concentration and Insight, “Grand Master T’ien-t’ai’s doctrine of spiritual contemplation is based on the ‘three thousand existences contained in one thought’ doctrine. … Those who seek his teaching must not think that there is an ultimate doctrine of T’ien-t’ai’s except this.” The numerous doctrines expounded in the 60 fascicles and 3,000 pages of writings on the Lotus Sūtra as interpreted by T’ien-t’ai (three major writings of T’ien-t’ai, 10 fascicles each, and Miao-lé’s annotations on them, also 10 fascicles each) are not enough to perceive the true intent of Grand Master T’ien-t’ai. Instead, we should master just the first several lines (on the “3 ,000 existences contained in one thought” doctrine) in the fifth fascicle of the Great Concentration and Insight.

Ichidai Shōgyō Tai-I, Outline of All the Holy Teachings of the Buddha, Writings of Nichiren Shōnin, Doctrine 3, Page 89-90