大方廣圓覺修多羅了義經略疏 1.718

1.718

前於身心之中推求無我，故名我空。此則身、心及境一一自空，故名法空。然身等本空，非今始滅，故經云：「色即是空，非色滅空。」但以迷時執有，今執盡始無，義言滅也。

Previously, one investigated within body and mind and sought the absence of a self; hence it was called the emptiness of persons. Here, the body, mind, and objects are each inherently empty; hence it is called the emptiness of dharmas. However, the body and so forth are fundamentally empty, not newly ceasing now. Hence the sūtra states: 'Form is emptiness; it is not that the cessation of form is emptiness.' It is only because when deluded one grasped at existence, and now that grasping is exhausted it is absent, that it is figuratively said to cease.