瑜伽論記 20.286

20.286

喻中，略引二喻，有何差別，有古德說：鏡面譬譬心真如門，水浪喻喻心生滅門。今奘法師云：西方諸師釋二喻所說同，但欲令明了本義故須二喻。

In the analogies: briefly citing two analogies, what is their difference? An ancient master said: the mirror-surface analogy analogizes the gate of the mind's tathatā, and the water-wave analogy analogizes the gate of the mind's arising and perishing. Now Master Xuanzang says: what the masters of the Western regions say in explaining the two analogies is identical; it is simply to make the fundamental meaning clear that two analogies are needed.