大乘起信論別記 1.194

1.194

證發心中，言「三者業識心微細起滅故」者，欲明菩薩二智起時非專無累，不同佛地，是故猶有微細動念，謂根本業，不相應染，恒行不絕，與二智俱故。言發心有三種相，非謂業識，亦為發心之行德也，以起滅為其相故。

Within the aspiration through realization, regarding "third, because the subtle arising and ceasing of the mind of karmic consciousness": this intends to clarify that when the two cognitions of the bodhisattva arise, they are not exclusively free from affliction, unlike the Buddha stage; therefore there is still subtle movement of thought, meaning the fundamental karma, the non-conjoined defilement, which operates constantly without cessation, coexisting with the two cognitions. It is said that cittotpāda has three characteristics; this does not mean that the karmic consciousness itself is the virtue of practice of cittotpāda, because arising and ceasing are its characteristics.