仁王經疏 3.353

3.353

釋曰：第二、合釋有無。言在有常脩空者，釋上用而常寂。處空常萬化者，釋上寂而常用。

Explanation: The second jointly explains existence and non-existence. Saying 'being in existence, constantly cultivating emptiness' explains the above 'functioning yet constantly quiescent.' 'Dwelling in emptiness, constantly manifesting myriad transformations' explains the above 'quiescent yet constantly functioning.'