成唯識論述記 7.532

7.532

述曰：若唯識無，便是無俗諦，俗諦即依他故。俗諦若無，亦無真諦，以真、俗相依建立故，依識俗事有真識理，此二相依互相待故，闕一不可。四重俗諦中，前三是俗諦，俗諦中第四俗諦，是俗中真諦，故俗中定真、俗亦是相依。四重真諦中，前三是俗諦，第四是真諦，即真中真、俗亦是相依，若總四俗、真相望，皆真皆俗亦是相依，若無一俗，真對何立，無真亦爾，故二諦須有。

The Commentary states: If consciousness-only did not exist, there would be no conventional truth (saṃvṛti-satya), because conventional truth is precisely the other-dependent nature. If conventional truth did not exist, neither would ultimate truth (paramārtha-satya) exist, because the ultimate and conventional are established in mutual dependence. Based on the conventional facts of consciousness, there is the ultimate principle of consciousness; because these two are mutually dependent and mutually relative, neither can be missing. Among the fourfold conventional truths, the first three are conventional truth; the fourth conventional truth within conventional truth is the ultimate truth within the conventional; therefore, within the conventional, the ultimate and conventional are certainly mutually dependent. Among the fourfold ultimate truths, the first three are conventional truth, and the fourth is ultimate truth, so within the ultimate, the ultimate and conventional are also mutually dependent. If the four conventionals and the four ultimates are viewed together, all ultimate and all conventional are also mutually dependent. If there were not one conventional, against what would the ultimate be established? Without the ultimate, it is likewise; therefore both truths must exist.