金光明經文句記 4.54

4.54

Third, he explains the phrases of mutual identity. Although various sūtras and treatises explain emptiness and the middle with many or few names and characteristics, if the middle is identical to the extremes and emptiness sweeps clean the three truths, then in the Perfect Teaching these are different names for one single essence. This is the meaning of mutual identity, requiring neither mutual refutation nor reciprocal cultivation.