[In the sixth month of the 3rd year of the Kenji era (1277), Nichiren Shōnin wrote a letter of explanation in place of Inaba-bō Nichiei, a disciple of Nichiren, and submitted it to Nichiei’s father, Shimoyama Hyōgo Gorō Mitsumoto.]

I am sorry to trouble you, but I would like to inform you of one thing in advance. This master, Nichiren Shōnin, is the one and only master of virtue and is a sagacious and irreplaceable person. If the worst should happen, you would surely be sorry. It is rather foolish for you not to believe in him just because the people in the world do not believe in him. When the rulers of Japan put faith in him, everyone will believe in him. It will be useless for you to believe in him then. Putting faith in him because the rulers of Japan believe in him means that you believe in a man, not the dharma. The people in the world think that children must obey their parents, retainers obey their lord, and disciples follow their masters, but this is a wrong idea held by those who know neither Buddhism nor non-Buddhist teachings. In the Filial Piety, a Confucian classic, it is stated that when a father makes a mistake, his son should remonstrate with him, and that when a lord makes a mistake, his retainer should admonish him. In Buddhism it is preached: “He who enters Buddhism, discarding the favors of his parents, is one who truly compensates the favors received from his parents.”

Prince Siddhārtha, who had become a monk against the wishes of His father, King Suddodana, became the Buddha to lead His parents to Buddhahood. In the end He became the most filial son in the world. Filial Pi-kan was killed for remonstrating his father, King Chou Hsin of the Yin Dynasty, and left behind the fame of being a man of wisdom. If you disregard what I say as words of a petty monk, I am sure you will regret it not only in the present life but also in the one to come.

Shimoyama Goshōsoku, The Shimoyama Letter, Writings of Nichiren Shōnin, Volume 5, Page 96