無量壽經優婆提舍願生偈註 2.94

2.94

問曰：心入實相可令無知，云何得有一切種智耶？答曰：凡心有知則有所不知，聖心無知故無所不知。無知而知，知即無知也。

Question: If the mind's entering the real mark can cause it to be without knowing, how can it have the all-inclusive knowledge of aspects (sarvākārajñatā)? Answer: When the ordinary mind knows, there is something it does not know; because the noble mind is without knowing, there is nothing it does not know. Knowing without knowing, its knowing is precisely non-knowing.