仁王護國般若波羅蜜多經疏 2.399

2.399

解曰：上言法者，蘊等法也。同法性者，同真如性。性相依持，體不相離，了相即性，寂然空故。從此第二即受觀空。於中分三：一體性清淨、二明行不實、三總結明空。且初第一標性清淨。

The commentary explains: Above, 'phenomena' refers to the phenomena of the aggregates and so forth. 'Identical with dharmatā' means identical with the nature of suchness. Nature and characteristics mutually rely on each other, their essence being inseparable; understanding that characteristics are precisely the nature, they are serenely empty. From here, the second part concerns contemplating emptiness directly through feeling. In this, there are three parts: 1. The purity of essential nature; 2. Clarifying that conditioning is unreal; 3. A general conclusion clarifying emptiness. First, the first part indicates the purity of nature.