淨名經集解關中疏 2.258

2.258

The Bodhisattva Nārāyaṇa said, "The mundane and the supramundane constitute duality. The nature of the mundane being empty is itself the supramundane. Within it, there is no entering and no exiting, no overflowing and no dispersing. This is entering the dharma gate of non-duality."
Kumārajīva says, "The mundane refers to the three realms; the supramundane refers to liberation. Realizing that the nature of the mundane is fixedly devoid of entering or exiting is non-duality."