大般涅槃經集解 10.77

10.77

案僧亮曰：體無生滅，或隱或顯。僧宗曰：絕言故，不可名之為常；絕眾相故，非念念滅。

Sengliang states: Its essence has neither arising nor ceasing, sometimes hidden and sometimes manifest. Sengzong states: Because it transcends speech, it cannot be called permanent; because it transcends all characteristics, it does not perish moment by moment.