大乘起信論裂網疏 2.71

2.71

"All marks of mind and consciousness" generally points to the eight mind-kings and includes their associated mental factors. "Are marks of ignorance" means that because from beginningless time they have never awakened, conventionally their marks are distinct. "Neither one nor different from original awakening": tathatā in its entirety becomes original awakening and ignorance; original awakening is of an untainted nature, while ignorance is of a tainted nature, so they are not one; yet they together take tathatā as their essence, so they are not different. "Neither destructible": because the nature of ignorance is itself tathatā, it is not different from original awakening. "Nor indestructible": because the marks of ignorance are contrary to tathatā, they are not one with original awakening.