大乘起信論義記 2.198

2.198

以有不覺妄想心故，能知名義為說真覺。若離不覺之心，則無真覺自相可說。

“Because there is the deluded mind of non-enlightenment, one can know names and meanings, and true enlightenment is explained for its sake. If separated from the mind of non-enlightenment, there would be no self-mark of true enlightenment that could be spoken of.”