金剛經纂要刊定記 6.50

6.50

In "the purity of wisdom," the five sections proceed from narrow to broad, counting successively: counting sands, counting rivers, counting realms, counting beings, and counting minds. Desiring to clarify that the Tathāgata's wisdom is subtle and able to know, it is manifested through the vastness of the realms known; this can all be seen in the sūtra.