大方廣佛華嚴經隨疏演義鈔 32.13

32.13

疏「空與非有無二為一真空」者，即第四，取真空上空義、幻有上非有義，二義相順明其不二。然是空上遮定有義，非有上即是空義，故二相順得成真空，為非有非不空存泯無礙之中道。三是存俗泯真，此是存真泯俗。又三是空徹於有，今是有徹於空，皆二諦交徹。

Regarding the commentary's "Emptiness and non-existence being non-dual constitute one true emptiness": this is the fourth, taking the meaning of emptiness on true emptiness and the meaning of non-existence on illusory existence, these two meanings according with each other to illuminate their non-duality. However, it is the meaning of precluding definitive existence on emptiness, and the meaning of being identical with emptiness on non-existence; hence the two accord with each other to constitute true emptiness, which is the Middle Way of non-existence and non-non-emptiness, where preservation and annihilation are unobstructed. The third preserves the conventional and annihilates the ultimate; this one preserves the ultimate and annihilates the conventional. Furthermore, the third is emptiness penetrating existence; this one is existence penetrating emptiness; both are the mutual penetration of the two truths.