成唯識論述記 6.42

6.42

述曰：然勤依者，如此下說，及《對法》第十等皆云：「信為欲依，欲為精進依」，即入佛法次第依也。然欲既通三性，即唯善欲為依。今又解勤者，勤劬，染法懈怠勤作諸惡，亦是勤故；無記事勤，即欲、勝解。若言精進，精進唯善；勤通三性，皆欲為依，非唯善勤。下文說欲能起正勤，前解為勝。下三師解，此中所說第一總意。

The Commentary states: Now, regarding "the support for diligence (vīrya)": as stated below and in fascicle 10 of the Abhidharma-samuccaya-vyākhyā, etc., which all say: "Faith is the support for desire; desire is the support for zeal (vīrya)," this is the sequential support for entering the Buddha's Dharma. However, since desire pertains to all three moral natures (trisvabhāva), then only wholesome desire serves as the support [for vīrya]. Now, another explanation is that diligence means exertion: when afflicted dharmas exhibit indolence (kausīdya) and exert effort in committing evil, that is also diligence; in indeterminate dharmas, diligence is desire and resolve. If one speaks of "zeal" (vīrya), zeal is exclusively wholesome; diligence pertains to all three moral natures, all having desire as their support, not only wholesome diligence. The text below says that desire can give rise to correct exertion; the former explanation is superior. Three masters explain below; what is stated here is the first general intention.