大方廣圓覺修多羅了義經略疏 1.571

1.571

今初第一，云義本者，以普賢但徵修幻，不問幻之所生。佛說生於覺心，未為正答所問。且要標之為本，憑之顯幻盡覺圓，故得修幻義成。幻盡元非斷滅，故《論》云：「自性清淨心，因無明風動，乃至無明滅，智性不壞。如風止動滅，濕性不壞等。」

Now, as for the first: calling it the doctrinal basis is because Samantabhadra merely inquired about cultivating illusion, not about where illusion arises. When the Buddha states that it is born in the mind of enlightenment, this is not yet the direct answer to what was asked. Yet he first needs to indicate this as the basis, relying on which he reveals that when illusion is exhausted enlightenment is perfect; thus the meaning of cultivating illusion can be established. When illusion is exhausted, it is fundamentally not annihilation. Therefore the Śāstra states: “The inherently pure mind is stirred by the wind of avidyā, up to: when avidyā is extinguished, the nature of wisdom is not destroyed. Just as when the wind ceases the motion is extinguished, but the nature of wetness is not destroyed,” and so forth.