觀音玄義記 1.8

1.8

Third, under "Therefore without...", quelling and illuminating being mutually identical concludes the virtuous aspects of the two bodies, which has two parts: first, the aspect of the responsive body. The middle-way dharmadhātu dual-quells the two extremes, hence "it is nowhere present"; its very substance dual-illuminates, hence "it is nowhere absent." "Bodies that transform and respond to the nine realms": here "transform" is explained as sudden appearance, and combined with "response" it becomes two, making the aspects of manifest benefit complete.