There are two ways of meditating on the doctrine of “3,000 existences contained in one thought.” One is the “theoretical” way, and the other is the “actual” way. Grand Masters T’ien-t’ai and Dengyō practiced the former. I, Nichiren, now practice the latter. As my method of practicing meditation is superior, difficulties befalling me are harder to bear. What T’ien-t’ai and Dengyō propagated was based on the doctrine of “3,000 existences contained in one thought” expounded in the theoretical section [of the Lotus Sūtra], while what I, Nichiren, propagate is based on the doctrine of “3,000 existences contained in one thought” in the essential section. The difference between the two is as great as the difference between heaven and earth. Remember this especially at the time of the last moment of life. Have an unwavering faith in the Lotus Sūtra and continue chanting the daimoku, which is the right way of meditation based on the “actual” doctrine of “3,000 existences contained in one thought. ”

Toki Nyūdō-dono Go-henji: Chibyō-shō, A Response to Lay Priest Lord Toki: Treatise on Healing Sickness, Writings of Nichiren Shōnin, Doctrine 2, Page 257