大乘起信論裂網疏 3.72

3.72

'Unassociated ignorance' specifically refers to the seeds of ignorance within the eighth consciousness, which are not associated with the active manifestations of the eighth consciousness. This explains that although through the power of ignorance from beginningless time, by the nature of things there are these eight consciousnesses, the various mental factors each with four aspects, up to all sense-realms, nevertheless these dharmas originally have no alteration and originally have no change; they are still the one true dharmadhātu. If in thought after thought one can contemplate that the moving mind is itself free from arising and ceasing, one then enters the aspect of tathatā and realizes the Tathāgata's wisdom. It is only because of occasionally losing awareness and not being enlightened to the one dharmadhātu that the seeds of ignorance in the eighth consciousness immediately associate with the first seven, active discriminations thereupon arise, and they again produce the various defiled minds.