大方廣佛華嚴經隨疏演義鈔 38.21

38.21

疏「於我無我而不二」者，生公云：「既理不從我為空，豈有我能制之哉？則無我矣。無我本無生死中我，非不有佛性我也。」解曰：此即無我法中有真我，故不二也。「諸佛」下，引《中論》，則二雙非也。實相之中二義俱寂，非有無我與我二也，實相之中豈有處所？

In the commentary, regarding "one is non-dual regarding self and non-self": Master Sheng says: "Since the principle does not conform to the self and is empty, how could there be a self that can control it? Thus there is non-self. Non-self fundamentally lacks the self in saṃsāra, not that it lacks the self of Buddha-nature." Explanation: This means that within the dharma of non-self there is the true self, and therefore they are non-dual. From "the Buddhas" downward, citing the Madhyamakaśāstra, refers to double negation. In the real mark, both meanings are quiescent; it is not that non-self and self are two separate things. Within the real mark, how could there be a place?