When Śāripūtra, a man of the Two Vehicle considered unable to attain Buddhahood in the pre-Lotus sūtras, was guaranteed future Buddhahood, he expressed his astonishment in the third chapter, “A Parable,” “Is this not a devil pretending to be the Buddha, trying to trouble and confuse my mind?” The Buddha preaches in the fifth chapter, “The Simile of Herbs,” “Regarding this essential doctrine, I kept silent for a long time without revealing it at once.” These make clear that the sūtras preached before the Lotus Sūtra are all expedient; only the Lotus Sūtra is the True Dharma.

Ichidai Goji Keizu, Genealogical Chart of the Buddha’s Lifetime Teachings in Five Periods, Writings of Nichiren Shōnin, Doctrine 3, Page 243