成唯識論述記 2.553

2.553

述曰：「真」以簡妄，「如」以別倒。初簡所執；後簡依他。或「真」以簡有漏，非虛妄故；「如」以別無漏，非有為故。「真」是實義；「如」是常義，故名「真如」。若爾，此與化地部計實有善等真如，有何差別？

The Commentary states: 'True' excludes the false, and 'Thus' differentiates from the inverted. The former excludes the imagined nature; the latter excludes the dependent nature. Alternatively, 'True' excludes the defiled, because it is not deceptive and false; 'Thus' differentiates from the undefiled, because it is not conditioned. 'True' means real; 'Thus' means permanent; hence it is named 'tathatā'. If so, what difference is there between this and the Mahīśāsaka conception of a truly existent tathatā of wholesome phenomena and the like?