大般涅槃經義記 2.219

2.219

自下第二開解脫德，於中有四：一就涅槃開解脫德、二「迦葉言：解脫為色、為非色」下明解脫體、三「唯願哀愍重垂廣」下彰解脫相、四「迦葉言：不生不滅為解脫」下拂遣詮況。初中，迦葉先問起發，「何等涅槃」徵體起用。下佛答之，名為解脫。

From here below, second, the virtues of liberation are opened up, within which there are four parts: 1. opening up the virtues of liberation in terms of nirvāṇa; 2. from "Kāśyapa said: Is liberation form, or is it non-form?" downward, clarifying the essence of liberation; 3. from "We only pray that out of pity you will deign to broadly [explain] again" downward, revealing the characteristics of liberation; 4. from "Kāśyapa said: Non-arising and non-ceasing are liberation" downward, brushing aside and discarding designations and metaphors. In the first, Kāśyapa first poses a question to initiate [the discourse], "What kind of nirvāṇa?" interrogating the essence to activate its functioning. Below, the Buddha answers it, naming it liberation.