The fundamental teaching of the Lotus concerning the reality of the universe amounts to this, that every being exists and subsists by virtue of the inexhaustible qualities inherent in each. There are innumerable individuals, and also groups of beings, including Buddhas and Bodhisattvas, celestial beings, mankind, furious spirits, beings in the purgatories, etc. Their respective characteristics are unmistakably distinct, but their qualities and conditions are constantly subject to change, because in each of the beings are inherent the qualities manifest in others, the differences arising simply from the varying configuration of the manifest and the potential qualities. Moreover, even taking the existences as they are at a given moment, they cannot subsist but by mutual interaction and influence. To subsist by itself by no means signifies to be separate from others; on the contrary, to interact one with another is the nature of every particular being. These features of existence are the laws or truths (dharma), and the cosmos is the stage of the infinite varieties and interactions of the dharmas, in other words, the realm of “mutual participation.”
Nichiren, The Buddhist Prophet