大方廣佛華嚴經隨疏演義鈔 20.14

20.14

疏「及空有稱真之理」者，此空是外空。若以理空對外空，外空離法是斷滅空，理空即事名為真空。若以外空亦心所現，亦由對色滅色方顯，則此斷空從緣無性，即性空也。故十八空明大空者，謂十方空，即十方虛空，亦是性空矣。是故疏云空有稱真之理，即有之空皆性空也。

Regarding the commentary's statement, "and the principle of emptiness and existence matching the real": this emptiness is external emptiness. If one contrasts the emptiness of principle with external emptiness, external emptiness detached from dharmas is annihilationist emptiness, whereas the emptiness of principle identical with phenomena is true emptiness. If external emptiness is also manifested by the mind, and is also revealed through opposing form and extinguishing form, then this extinguished emptiness, lacking intrinsic nature due to conditions, is precisely emptiness of intrinsic nature. Therefore, when the eighteen kinds of emptiness explain the "great emptiness," it refers to the emptiness of the ten directions—that is, the space of the ten directions—which is also emptiness of intrinsic nature. Therefore the commentary says, "the principle of emptiness and existence matching the real"; that is, the emptiness of existence is in every case the emptiness of intrinsic nature.