成唯識論掌中樞要 2.36

2.36

許類是假，不能持內法實種：前第一卷如堤塘等，假遮實水，此何不爾，暫息滅遮假定可爾，畢竟永持於理未可。若爾，佛身、別解脫戒等亦畢竟遮，何義不同。遮是息義，可假遮實；持是任義，故假不持。

To grant that a generic category is nominal and cannot sustain the real seeds of internal dharmas: in the first fascicle above, like a dike or embankment, nominal [structures] ward off real water; why would this not be so here? Temporarily halting and warding off can certainly be nominal; enduringly sustaining forever is unreasonable. If so, the Buddha's body, the prātimokṣa vows, and so forth also ward off permanently; why would their meanings differ? Warding off has the sense of cessation, so the nominal can ward off the real; sustaining has the sense of upholding, hence the nominal does not sustain.