首楞嚴義疏注經 7.168

7.168

指現相也。已成虛妄，故云非真。而求於復，便現虛相，此即所變真影轉成世間諸相也。其相體虛，故云非相。非，猶妄也。此即總舉，非生下別列。無而忽有故生，有而暫止故住，緣慮相續故心，染淨差別故法，體元不實故皆言非。於中非心，即是六麁中前二麁也。

This points to the mark of manifestation. Since it has already become false, it is called 'not real.' Yet seeking to return, unreal marks instantly appear; this is precisely the transformed shadow of the real turning into the various marks of the mundane world. Their substance is empty, hence they are called 'unreal marks.' 'Unreal' is equivalent to 'false.' This is a general statement, and below 'unreal arising' they are listed separately. Arising suddenly where there was nothing is 'arising'; pausing temporarily after having arisen is 'abiding'; the continuity of cognitive deliberation is 'mind'; the differences of defilement and purity are 'phenomena.' Because their substance is originally unreal, all are called 'unreal.' Among them, 'unreal mind' refers to the first two coarse marks among the six coarse marks.