金剛經纂要刊定記 4.143

4.143

解通者，如前解了一切相非相也。前是真見，此是似見，故《起信》云：「法身無有彼此色相迭相見故。」

Regarding "understanding penetrates": as previously explained, understanding that all marks are non-marks. The former is true seeing; this is semblance seeing. Therefore the Awakening of Faith states, "The dharmakāya has no physical marks of self or other that see one another reciprocally."