What is defiled aspect and pure aspect?

The mystic principle that is the essential nature of phenomena possesses two aspects, the defiled aspect and the pure aspect. If the defiled aspect is operative, this is called delusion. If the pure aspect is operative, this is called enlightenment. Enlightenment constitutes the realm of Buddhahood. Delusion constitutes the realms of ordinary mortals. 11/6

The Writings of Nichiren Daishonin
The Entity of the Mystic Law
Written to Sairen-bo Nichijo; date unknown