仁王護國般若波羅蜜多經疏 3.73

3.73

解曰：有為不實者，依他有為，幻不實故。從因緣起者，共相自種親生內外世間，因緣起故。盛衰電轉者，謂有為法皆有盛衰，起滅如流、不住如電。暫有即無者，無者暫如電，有即滅無矣。從此第二明界趣空。

Explanation: "Conditioned things are unreal": conditioned things of dependent origination are illusory and not real. "Arising from causes and conditions": internal and external worlds are directly produced from common characteristics and their own seeds, because of arising from causes and conditions. "Waxing and waning turn like lightning": all conditioned phenomena have waxing and waning; their arising and ceasing are like a flowing stream, their non-abiding is like lightning. "Temporarily existing, then immediately non-existent": "non-existent" means that, like temporary lightning, once existent, they immediately cease into non-existence. From here, the second section explains the emptiness of realms and destinies.