法華論疏 2.92

2.92

This specifically brings forth the essence of profundity, taking unsurpassed bodhi as the actual essence of profundity. Bodhi transcends speech and thought, and therefore is called profound. From 'Furthermore, "profound"' downward: the former clarified the profundity of its own essence; the present clarifies that the two vehicles cannot fathom it, and therefore it is called profound.