大乘起信論義記 3.112

3.112

In the former part, "avidyā is extinguished" means that fundamental avidyā is exhausted. "Because avidyā is extinguished, the mind has no arising" means that the deluded mind is exhausted. "Because there is no arising, the objective realms are extinguished" means that deluded realms are extinguished. This is the reversal of the three kinds of defiled dharmas mentioned before. From "because cause and condition" down to "spontaneous activity" explains the realization of the virtues of the Dharma. The cause refers to avidyā; the condition refers to deluded realms; the marks of the mind refer to the defiled mind. Because these are all exhausted, the mind-essence undergoes the transformation of the basis; this is called "attaining nirvāṇa." Giving rise to inconceivable activity is called "spontaneous activity."