大乘起信論義記 3.96

3.96

It is because relying on the phenomenon of tathatā there is avidyā; because there is the cause of the defiled phenomenon of avidyā, it perfumes tathatā. Because of perfuming, there is the false mind; because there is the false mind, it perfumes avidyā. Because of not understanding the phenomenon of tathatā, non-enlightened thoughts arise and manifest false perceptual objects. Because of the condition of the defiled phenomenon of false perceptual objects, it perfumes the false mind, causing it to dwell in thought and attach, creating various karmas and undergoing all bodily and mental sufferings.