大乘起信論義記 3.41

3.41

In the explanation, first, the coarse is separated from up to the first ground, and afterwards, the subtle is exhausted up to the Buddha ground. This is the avidyā-entrenched ground upon which the defiled mind above relies, which can defile tathatā to form the defiled mind. When it was said above that one 'breaks the composite consciousness', it is because avidyā is extinguished. When it was said that one 'extinguishes the continuing mind', it is because the defiled mind is severed. Now, although avidyā and the defiled mind are spoken of as having a before and after, their antidotal eradication occurs simultaneously.