For Nichiren, the revelation of the original Buddha which takes place in the sixteenth chapter has two meanings: that of a theory of the nature of the Buddha, and that of a speculation on the situation of humankind. Śākyamuni’s “original causes and original results” become the turning point which allows postulating the contemporaneity of human beings to the Buddha. Human beings, in their spatial and temporal limitations, share the temporality of Śākyamuni in this world. Nichiren uses a theory elaborated by Chih-i according to which the past of Śākyamuni is reflected in the past of his disciples. This is the tie established, in the original time, between Śākyamuni and those who listen to the sutra or are willing to accept it. From here Nichiren draws the certainty of buddhahood for human beings:

We living beings of this land are since as many kalpas ago as five hundred particles of dust Śākyamuni’s beloved children. [The relation] between a Buddha with ties and the living beings [bound] by karmic ties can be compared to [the reflection of] the moon in the sky floating on clear water. A Buddha without ties in relation to sentient beings is like a deaf man listening for the sound of thunder or a blind man turning to sun and moon.