All the worlds throughout the universe, therefore, are the dependent reward while all living beings are the principal reward. The dependent reward is like the shadow of the principal reward. As there is no shadow without a substance, there is no dependent reward without the principal reward. However, the principal reward is also created by the dependent reward. We should know that the eyes are created by the east, the tongue by the south, the nose by the north, the body by the four directions, and the mind by the center. Accordingly, when the five sense organs of a living being are about to be destroyed, it is inevitable that the earth in four directions or in the center trembles. In other words, when a country is about to be destroyed, there will inevitably be such omens as the crumbling of mountains, death of plants, and the drying up of rivers.

Zuisō Gosho, Writing on Omens, Writings of Nichiren Shōnin, Followers I, Volume 6, Page 121