金剛經纂要刊定記 7.100

7.100

Regarding "If wisdom..." and so forth: this clarifies that the essence of these three is wisdom itself, but because the skillful means on which they rely differ, three names are established. Śamatha here means calm abiding; calm abiding is samādhi. When wisdom relies on this samādhi, it completely calms the myriad conditions, so that mind alone exists; thus it is called "knowing."