金剛經纂要刊定記 4.63

4.63

信解等者。以己方人也。由內無自相，故得外無他相，中有故，自是所以也。既無自他之相，即自他平等。志公云：「以我身空諸法空，千品萬類悉皆同。」

The commentary's 'Faith and understanding, etc.': comparing others to oneself. Because internally there is no mark of self, externally there is no mark of others; the 'because' in the middle naturally provides the reason. Since there are no marks of self and other, self and other are equal. Master Baozhi said: 'Because my body is empty, all phenomena are empty; / thousands of grades and myriad kinds are all the same.'