大乘起信論略述 1.174

1.174

論。無明亦爾至非心智滅　述曰。此法合也。無明亦爾依心體動者。顯離於心不能自動。若心體滅。眾生斷絕。無所依止者。謂境滅時心體滅者。則無明風無所動故。其業轉現眾生斷絕無所依止。以體不滅心得相續者。以境滅時體不滅故。無明三細不相應心而得相續。良以無明滅故境界滅。非境界滅故無明滅。由是義故。境界滅時無明動心三細相續。此答初問。顯其相應心滅義也。唯癡滅故心相隨滅非心智滅者。以彼無明癡風盡時業等動相亦隨滅盡。非淨心體而亦隨滅。是答後問。顯不相應心滅義也。

Treatise: "Ignorance is also like this: [it moves in reliance upon the essence of the mind; if the essence of the mind ceases, sentient beings would be severed and have nowhere to rely upon; because the essence does not cease, the mind can continue. Only because delusion ceases does the characteristic of the mind cease along with it,] not that the wisdom of the mind ceases."
Exposition: This is the application to the doctrine. "Ignorance is also like this: it moves in reliance upon the essence of the mind" reveals that apart from the mind it cannot move on its own. "If the essence of the mind ceases, sentient beings would be severed and have nowhere to rely upon" means that if the essence of the mind ceased when objects cease, then the wind of ignorance would have nothing to move; its activity, turning, and manifesting sentient beings would be severed and have nowhere to rely upon. "Because the essence does not cease, the mind can continue" means that because the essence does not cease when objects cease, the three fine unconcorded minds of ignorance are able to continue. In truth, it is because ignorance ceases that objects cease, not that because objects cease ignorance ceases. By this principle, when objects cease, the mind moved by ignorance and the three fines continue. This answers the first question, revealing the meaning of the cessation of the concordant mind. "Only because delusion ceases does the characteristic of the mind cease along with it, not that the wisdom of the mind ceases" means that when the wind of delusion of that ignorance is exhausted, the moving characteristics such as activity also cease and are exhausted along with it, not that the pure essence of the mind also ceases along with them. This answers the latter question, revealing the meaning of the cessation of the unconcorded mind.