Craving and Enlightenment, Delusion and Awakening

Q: Craving and enlightenment, and delusion and awakening, are distinct. Is it not careless [to emphasize] the relative aspect of their meaning?

A: A distinction is made between delusion and awakening with regard to conditions, but since they are [fundamentally] unchanging, the essence of the defiled and of the pure are one. Therefore it is said that craving and enlightenment, and the cycle of birth and death and Nirvāṇa, are identical.

Tendai Lotus School Teachings, p 81