Worms that live in trees eat timber, and fish that live in water drink water. It is said that orchids sigh when a lawn dies, and that an oak is pleased when a pine tree prospers. Even plants are like this. An imaginary bird called hiyoku has two heads in one body with two mouths feeding the single body. Imaginary fish called himoku have only one eye each thus the male and female stay together without separation throughout life. Thus, should be the relationship between a husband and wife. In order to accomplish the faith in the Lotus Sūtra, the wife should not regret being with her husband, even if the result is death. If the wife is of one mind with her husband and struggles with him, she will succeed the dragon girl who attained Buddhahood in the “Devadatta” chapter of the Lotus Sūtra and become an example of attaining Buddhahood by women in the Latter Age of Degeneration.

Kyōdai-shō, A Letter to the Ikegami Brothers, Writings of Nichiren Shōnin, Volume 6, Followers I, Page 84