Day 14 covers all of Chapter 9, The Assurance of Future Buddhahood of the Śrāvakas Who Have Something More to Learn and the Śrāvakas Who Have Nothing More to Learn, and opens Chapter 10, The Teacher of the Dharma.
Having last month witnessed Śākyamuni’s instructions to Medicine-King Bodhisattva at the start of Chapter 10, we hear the Śākyamuni’s prediction of who will become a Buddha.
“Medicine-King! lf anyone asks you who will become a Buddha in his future life, answer that such a person as previously stated will! Why is that? The good men or women who keep, read, recite, expound and copy even a phrase of the Sūtra of the Lotus Flower of the Wonderful Dharma, and offer flowers, incense, necklaces, incense powder, incense applicable to the skin, incense to burn, canopies, banners, streamers, garments and music to a copy of this sūtra, or just join their hands together respectfully towards it, should be respected by all the people of the world. All the people of the world should make the same offerings to them as they do to me. Know this! These good men or women are great Bodhisattvas. They should be considered to have appeared in this world by their vow to expound the Sūtra of the Lotus Flower of the Wonderful Dharma out of their compassion towards all living beings, although they already attained Anuttara-samyak-saṃbodhi [in their previous existence]. Needless to say, those who keep all the passages of this sūtra and make various offerings to this sūtra [are great Bodhisattvas]. Medicine King, know this! They should be considered to have given up the rewards of their pure karmas and appeared in the evil world after my extinction in order to expound this sūtra out of their compassion towards all living beings. The good men or women who expound even a phrase of the Sūtra of the Lotus Flower of the Wonderful Dharma even to one person even in secret after my extinction, know this, are my messengers. They are dispatched by me. They do my work. It is needless to say this of those who expound this sūtra to many people in a great multitude.
Nichiren cites this section in Shohō Jisso-shō, Treatise on All Phenomena as Ultimate Reality:
I, Nichiren, am the lone forerunner of the bodhisattvas who emerged from the earth. I may even be one of them. If I am counted as one of the bodhisattvas that emerged from the earth, my disciples and followers too are among the rank of those bodhisattvas from the earth, are they not? The “Teacher of the Dharma” chapter states, “If someone expounds even a phrase of the Lotus Sutra even to one person in secret, then you should know that such a person is My messenger, dispatched by Me and carries out My work.” This refers to none other than us.
Shohō Jisso-shō, Treatise on All Phenomena as Ultimate Reality, Writings of Nichiren Shōnin, Faith and Practice, Volume 4, Page 77