大乘起信論義記 2.161

2.161

如是眾生自性清淨心，因無明風動，心與無明俱無形相、不相捨離，而心非動性。若無明滅相續則滅，智性不壞故。

In the same way, the mind of sentient beings, pure by its own nature, is moved by the wind of avidyā. Both the mind and avidyā have no shape or mark and do not abandon or part from each other, yet the mind is not of a moving nature. If avidyā is extinguished, continuation is extinguished, because the nature of cognition is not destroyed.