仁王般若經疏 3.114

3.114

Regarding "abiding in existence, they constantly cultivate emptiness": this explains being in existence without being defiled by existence, where existence does not obstruct emptiness. Knowing that existence is not existent, one can thus have emptiness and existence mutually unobstructed. "Dwelling in emptiness, they constantly perform myriad transformations": quiescent yet constantly active. Emptiness and existence are non-dual, hence it says "simultaneously illuminating all phenomena." Regarding "therefore knowing what is possible and what is impossible": this summarizes and explains the simultaneous illumination of existence and emptiness—emptiness is called "what is possible" and existence is called "what is impossible." It may also be the first [power], the power of [knowing] what is possible and impossible. Fourth, realizing the rank: "mahārāja" is translated here as "great minister." Since one contemplates emptiness and existence together and one's transformative practice assists the Buddha, it is called "great minister." As the sūtra says: "Śāriputra is the great general of the Buddha's Dharma." Fifth, advancing practice: it says "for a thousand asaṃkhyeya kalpas practicing the Dharma of the ten powers"—the ten powers are as explained separately. Regarding "thought-moment by thought-moment in resonance, constantly entering the samādhi of seeing the Buddha": attaining the understanding of non-attainment, hence it says "in resonance." "Constantly entering the samādhi of seeing the Buddha" means realizing the buddhānusmṛti-samādhi.