大乘起信論裂網疏 3.10

3.10

眾生亦爾，依於（真如）覺（性）故而有不覺，妄念迷生。然彼不覺自無實相，不離（真如）本覺。復待不覺以說真覺。不覺既無，真覺亦遣。

"Sentient beings are also like this: relying on [the nature of tathatā-] enlightenment, there is non-enlightenment, and deluded thoughts are born of delusion. However, that non-enlightenment itself has no real mark and is not separate from [tathatā,] original enlightenment. Furthermore, it is in dependence on non-enlightenment that true enlightenment is spoken of; once non-enlightenment is absent, true enlightenment is also dispelled."