It is the identity perceived by Buddhas that is the real state of things – the very Truth itself. Sakyamuni, fearing that such reasoning was above the comprehension of the people generally, embodied the Truth in the concrete form of his own person, in order that they might there see it for themselves, and thus addressed them: “Now, the three worlds – the mortal, the material, and the spiritual – are all my own possession; and all the living beings they contain are my own children.”
Doctrines of Nichiren (1893)