[Y]ou, Priest Hōren, produce golden-colored letters from your mouth every morning. As you read and recite the “jiga-ge” verse, you produce 510 golden characters. Each of these characters transforms itself to be the sun, which in turn changes to Śākyamuni Buddha, who emits the rays of bright light shining through the earth, the three evil realms (hell, realm of hungry spirits and that of beasts), the Hell of Incessant Suffering, and to all the directions in the north, south, east, and west. They shine upward to the “Heaven of neither Thought nor Non-Thought” at the top of the realm of non-form looking everywhere for the souls of the departed. Upon finding the spirit of your father, they politely say, “Whom do you think we are? We are the characters of the ‘jiga-ge’ of the Lotus Sūtra chanted by your son Hōren every morning. We will be your eyes, ears, legs, and hands.” Then your father’s spirit will say, “My son, Hōren, is not my son but a ‘good friend’ who leads me to Buddhahood,” and worship you toward the Sahā World. This is indeed true filial piety.

Hōren-shō, Letter to Hōren, Writings of Nichiren Shōnin, Volume 6, Followers I, Page 56-57