大般涅槃經義記 2.153

2.153

自下第三教奉持儀，依經學常名為奉持。上來答問，自下迦葉領解勸學，先自領解。「如來法僧不可思」者，領向末後三寶常義。「涅槃不思」，領前嘆勝，辯經名德。下勸他學，先明學益，後彰不學有其過損。

From here on, the third teaches the manner of upholding: relying on the sūtra to learn permanence is called upholding. The above answered the questions. From here on, Kāśyapa assimilates, understands, and urges study, first assimilating and understanding himself: “The Tathāgata, Dharma, and Saṅgha are inconceivable” assimilates the permanence of the Three Jewels at the very end; “nirvāṇa is inconceivable” assimilates the earlier praise of superiority distinguishing the merits of the sūtra's name. Below, he urges others to study, first clarifying the benefit of study, and later revealing that not studying brings fault and harm.