大乘起信論義記 2.182

2.182

In the explanation of the second, 'perfuming as cause,' internally there are two meanings of cause: first, the cause capable of producing manifest phenomena; second, the cause that performs internal perfuming. It may also be that the former is the meaning of 'cause' and the latter is the meaning of 'perfuming,' hence called 'perfuming as cause.' As for stating 'truly non-empty,' this generally presents the substance of the phenomenon of perfuming as cause, meaning that it possesses an own-substance and the virtues of its nature.