大方廣圓覺修多羅了義經略疏 2.662

2.662

依此修寂觀故，科云圓修三觀矣。又以圓覺合一切，是從體起用；性相無異覺性，是會用歸體。體用無礙，寂照同時，是為圓滿無上妙覺。

Because it relies on this to cultivate the contemplation of quiescence, the outline states: "perfectly cultivating the three contemplations." Furthermore, using perfect enlightenment to unite with everything is giving rise to function from essence; the nature and marks having no distinct nature of enlightenment is gathering function back into essence. Essence and function are unobstructed, quiescence and illumination are simultaneous—this is the consummate, unsurpassed, wondrous enlightenment.