成唯識論述記 6.332

6.332

述曰：下廣有二：初廢立；後問答辨。此初也。此「非別有體」，離彼四法無異相故，體性無別；「無別用故」，作用不殊，雙成無別體用也，其文易了。問：信等十法皆有防惡修善之能，何故唯於四法立也？

The Commentary states: The detailed explanation below has two parts: first, rejection and establishment; second, analysis through questions and answers. This is the first. This 'does not have a separate substance,' because apart from those four dharmas there is no distinct characteristic, so their essential substance is not distinct; 'because there is no separate function,' their active operation is not different, mutually establishing that there is no separate substance or function; the text is easy to understand. Question: Faith and the other ten dharmas all have the ability to guard against evil and cultivate the good; why is it established only upon the four dharmas?