大方廣佛華嚴經隨疏演義鈔 20.35

20.35

第二四禪。疏「只由真空能立因果」下，答上疑念。此句明其以有空義故一切法得成。若無有空義，因果定有，便墮於常。言「因果立故乃是真空」者，即因緣故空義。若離因果以明空者，是斷空故。

Second, the Fourth Dhyāna. Regarding the Commentary's statement from "Solely because true emptiness can establish cause and effect" onward: this answers the doubt raised above. This sentence clarifies that because there is the meaning of emptiness, all dharmas can be accomplished. If there were no meaning of emptiness, cause and effect would be definitely existent, and one would fall into eternalism. As for saying, "because cause and effect are established, it is true emptiness," this is the meaning of emptiness through causes and conditions. If one explains emptiness apart from cause and effect, that would be nihilistic emptiness.