成唯識論述記 5.284

5.284

述曰：下立理也，是《雜集論》文與此同也，謂離惛沈等則不成染。惛沈是無堪任，等取餘四。何以知者？《對法》第一云：惛沈者，無堪任為性；掉舉者不，寂靜為性；不信者，不忍等為性；懈怠者，心不策勵為性；放逸者，不防有漏為性故也。若離無堪任，染性不成故。

The Commentary states: Below establishes the rationale; it is text from the Abhidharmasamuccaya-vyākhyā and is identical to this, meaning that if separated from torpor and the rest, it would not constitute defilement. Torpor is unserviceability; 'and the like' includes the remaining four. How is this known? Fascicle 1 of the Abhidharmasamuccaya-vyākhyā says: 'Torpor has unserviceability as its nature; restlessness has lack of tranquility as its nature; lack of faith has lack of endurance and so forth as its nature; indolence has the mind's lack of exertion as its nature; heedlessness has failure to guard against contaminations as its nature.' This is because without unserviceability, the defiled nature would not be established.