In this respect, it can be said that those scholars of the present Tendai School who insist on the superiority of the Great Concentration and Insight over the Lotus Sūtra are ungrateful to their Founder T’ien-t’ai. How can they escape from that charge? Grand Master T’ien-t’ai was called Medicine King Bodhisattva when he heard Śākyamuni Buddha preaching the Lotus Sūtra on Mt. Sacred Eagle. He was at once Grand Master T’ien-t’ai in Sui China and Grand Master Dengyō in Japan. The teaching he propagated in his past, present and the future lives is on the whole the teaching of the Wonderful Dharma. There is no such person but Śākyamuni Buddha in India, China and Japan who has propagated the Lotus Sūtra throughout the past, present and future. Being the noblest, Grand Master T’ien-t’ai was misunderstood by scholars of the Tendai School inheriting his teaching, who pinned the guilt of their mistake on the innocent Grand Master. Is this not a serious sin?

Risshō Kanjō, A Treatise on Establishing the Right Way of Meditation, Writings of Nichiren Shōnin, Doctrine 2, Page 226