大般涅槃經義記 3.272

3.272

第四對中，「淨不淨想、不淨淨想，是顛倒法」總以標舉。下廣辯之，於中先明淨計不淨，淨「者即是如來常」等辯其所迷，「若有說」下彰其所立。下明淨倒，「不淨淨想名顛倒者」總以標舉，「若有說」下廣以辯之。「若說身中無一不淨」正明起倒，「以無不淨定當入」下舉終顯始，成其淨義，涅槃之果名清淨處。「如來說」下破穢顯淨，「是名」下結，「名第四倒」總以結之。領解可知，示同始行，故言「自前悉名邪見」。

In the fourth pair, 'Thinking pure to be impure and impure to be pure is the dharma of inversion' states the general heading. Below, it explains it at length, within which it first explains calculating the pure as impure: 'Pure is the Tathāgata's permanence' and so forth clarify that about which one is deluded; from 'If someone says' downward reveals what is established. Below, it explains the inversion of purity: 'Thinking impure to be pure is called inversion' states the general heading; from 'If someone says' downward explains it at length. 'If one says that within the body there is nothing impure' directly explains the arising of inversion; from 'Because there is nothing impure, one will definitely enter' downward adduces the end to reveal the beginning, establishing the meaning of purity, the fruit of nirvāṇa being called the pure place. From 'The Tathāgata says' downward refutes defilement and reveals purity; from 'This is called' downward concludes it; 'is called the fourth inversion' sums it up overall. The comprehension can be understood, showing conformity with initial practice; hence it says, 'All before this are called wrong views.'