大乘起信論內義略探記 1.51

1.51

第三問答除疑者，此六種染，以何為因方起？答：初三種染，無明為因、境界為緣方起。後三種隨染，本覺為因、根本無明為緣方起。謂無明住地能染真如，成染心故。即上云：破和合識者，滅無明故；滅相續者，斷染心故。今無明與染心起雖前後，而斷滅並一時也。

Third, questions and answers to remove doubts: By what cause do these six kinds of defilement arise? Answer: The first three defilements arise with avidyā as cause and the objective realm as condition. The latter three attendant defilements arise with innate awakening as cause and fundamental avidyā as condition. That is to say, the entrenchment of avidyā can defile tathatā, forming the defiled mind. This is what was stated above: breaking the composite consciousness is due to extinguishing avidyā; extinguishing continuity is due to severing the defiled mind. Now, although the arising of avidyā and the defiled mind are before and after, their severance and extinction occur together at one time.