大般涅槃經義記 2.219

2.219

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.