般若波羅蜜多心經贊 1.24

1.24

今依三性以釋四句，於四句中，初之二句標宗正說，後之二句遣外疑情。「色不異空」者，標俗不異真；「空不異色」者，標真不異俗。後遣外疑情，外人設疑：「互相依故為不異耶？為相即故名為不異？」故作此說，「色即是空，空即是色」，非相依故名為不異，非相即故名為不異。即依此文，西方諸師自有兩釋。

Now, explaining the four propositions based on the three natures: among the four propositions, the first two propositions indicate the principal correct teaching, and the latter two propositions eliminate doubts from outsiders. "Form is not different from emptiness" indicates that the conventional is not different from the ultimate; "emptiness is not different from form" indicates that the ultimate is not different from the conventional. Next, eliminating doubts from outsiders: an outsider might raise a doubt, 'Is it called not different because they mutually depend on each other? Or is it called not different because they are identical?' Therefore, this statement is made: 'Form is itself emptiness, emptiness is itself form'—it is not called not different because they mutually depend, nor is it called not different because they are identical. Based on this text itself, the Western masters have two explanations.