大般涅槃經集解 52.58

52.58

案僧亮曰：稱名解義也。心於因中非有非無，是俗諦中道也。即論心性，從因生故有，無自生故無，是真俗中道也。若就空本而言，此有亦無、此無亦無，是真諦中道。

Sengliang states: He matches the name to explain the meaning. The mind being neither existent nor non-existent within causes is the middle path of the conventional truth. Discussing the nature of the mind itself: because it arises from conditions it is existent, and because it does not arise from itself it is non-existent; this is the middle path of the ultimate and conventional. If spoken of from the perspective of the root of emptiness: this existence is also non-existent, and this non-existence is also non-existent; this is the middle path of the ultimate truth.