入楞伽心玄義 1.46

1.46

七、表玄者，謂自覺聖智舉體是真，更無餘智能證此真，故名難入。還令即真之智，證此即智之真，此即無入入。入而即無入，名難入也。

Seventh, concerning expressing the profound, the noble wisdom of self-realization is in its entire substance true; no other wisdom can realize this truth. Hence it is called difficult to enter. It further causes the wisdom that is identical with truth to realize this truth that is identical with wisdom. This is entry without entering. Entering yet being devoid of entering is called difficult to enter.