It is stated in the first fascicle of the Annotations on the Great Concentration and Insight, “It is impossible to interpret the teaching in the verses of the Flower Garland Sūtra without knowing all the Perfect Teachings of the T’ien-t’ai School.” It preaches also in the fifth fascicle “Without understanding the Lotus Sūtra, how can we interpret the sentence of the Flower Garland Sūtra that there is no difference among the mind, the Buddha, and people since mind creates everything in the world like a skillful painter.” The seventh fascicle of the Annotations on the Words and Phrases of the Lotus Sūtra states that the term “inherent evil” had never been heard anywhere except in the T’ien-t’ai School. According to these statements it is impossible to understand the meaning of the verses of the Flower Garland Sūtra without mastering the teaching of Grand Master T’ien-t’ai. Then it follows that among Chinese teachers no one but Grand Master T’ien-t’ai explained the term of “inherent evil” and it is impossible to discuss the teaching of “Three Thousand Existences Contained in One Thought” without the Lotus Sūtra.

Nijō Sabutsu Ji, Obtaining Buddhahood by the Two Vehicles, Writings of Nichiren Shōnin, Doctrine 3, Page 231-232