Therefore we say that, although Buddhas, bodhisattvas, men, and gods appearing in various sūtras seem to have obtained Buddhahood through their respective sūtras, in reality they were truly enlightened because of the Lotus Sūtra. The four great vows of Śākyamuni and other Buddhas such as saving a countless number of people were fulfilled in this sūtra of the Lotus. In the second chapter, it is stated, “My (Buddha’s) wishes are all fully satisfied.”

Kaimoku-shō, Open Your Eyes to the Lotus Teaching, Writings of Nichiren Shōnin, Doctrine 2, Page 80