大乘起信論義記 3.375

3.375

釋相中，真心者，謂根本無分別智也。方便心者，謂後得智也。業識者，二智所依阿梨耶識，理實亦有轉現，但今略舉根本細相，此非發心之德，但顯此菩薩二智起時，有微細生滅之累，不同佛地純淨之德，是故合為發心相。

In explaining the marks: the true mind refers to the fundamental non-discriminative cognition. The mind of skillful means refers to subsequently attained cognition. The karmic consciousness is the ālayavijñāna upon which the two cognitions rely; in principle, it actually also has the evolving and manifesting [aspects], but here it merely cites the fundamental subtle mark in brief. This is not a virtue of arousing the mind, but merely reveals that when the two cognitions arise in this bodhisattva, there is the burden of subtle arising and ceasing, which differs from the purely immaculate virtues of the Buddha ground; therefore, they are combined as the marks of arousing the mind.