成唯識論演祕 1.166

1.166

詳曰：難意令有以顯於理，答言對空亦說於有，豈可有觀能顯於理耶？若言不說有顯理者，即答前難有不盡失。

I examine [this] as follows: the intention of the objection was to have existence reveal the principle; the reply says that as a counter to emptiness, existence is also taught—how could a contemplation of existence reveal the principle? If one says it does not teach that existence reveals the principle, then the answer fails to resolve the previous objection and has the fault of incompleteness.