The Lotus Sūtra, fascicle 5 (15th chapter on “The Appearance of Bodhisattvas from Underground”) preaches, “I have always taught them in their past existence… , and as Soon as they saw Me and heard My preaching in this life, they received My teachings by faith, entering into the wisdom of the Buddha.” Interpreting this, Grand Master T’ien-t’ai states in his Words and Phrases of the Lotus Sūtra, “People today were taught and received the seed of Buddhahood in the eternal past.” Grand Master Miao-lê, on the other hand, declares in his Annotations on the Words and Phrases of the Lotus Sūtra, “Although it is in the present when people gain the benefit of attaining Buddhahood, the seed of Buddhahood was sown in the eternal past,” and in his Commentary on the Profound Meaning of the Lotus Sūtra, “Thus I know that the preaching of Śākyamuni Buddha today is for those in whom the seed of Buddhahood was sown in a past existence.” I do not have to explain what is said in the sūtra and its annotations, which are very clear in meaning. It is like a woman, regardless if she is a royal princess or a maid-servant, unless she becomes pregnant by the son of heaven, her child will never be the king of a country.

Soya Nyūdō-dono-gari Gosho, A Letter to Lay Priest Lord Soya, Writings of Nichiren Shōnin, Doctrine 3, Pages 150.