金剛經纂要刊定記 5.126

5.126

清淨等者。謂隨相之法建言必異，離相之理說即無差，以平等一味故，平等一味即勝義諦也，以是勝義故清淨矣。

"Pure...", etc.: With teachings that accord with characteristics, formulations in speech are necessarily divergent; but with the principle that is free from characteristics, when expounded it is without discrepancy, because it is of uniform, single flavour. Uniform, single flavour is precisely the ultimate truth; and because it is the ultimate, it is pure.