仁王護國般若經疏 3.7

3.7

問：真空妙有云何？答：動即寂，真空也。寂即動，妙有也。真空故非常，妙有故非斷。真空不住生死，妙有不住涅槃。妙有故能起大悲，真空故能生大慈。

Question: What are true emptiness and wondrous existence? Answer: Activity being identical to stillness is true emptiness. Stillness being identical to activity is wondrous existence. Because of true emptiness, it is not permanent; because of wondrous existence, it is not annihilated. True emptiness does not abide in saṃsāra; wondrous existence does not abide in nirvāṇa. Because of wondrous existence, one can give rise to great compassion (karuṇā); because of true emptiness, one can generate great loving-kindness (maitrī).