大般涅槃經義記 1.11

1.11

問曰：此經具明諸義，何故偏言大涅槃乎？涅槃為宗，故偏言耳，亦可諸義不可備彰，且舉涅槃。那者名息，今略不舉。息有三義：一息生死有為因果，趣入無為，名之為息；二息修契實，名之為息，故下文言「若能斷除三十七品所行之事，是名涅槃」；三息化歸真，名之為息。此舉所詮。

Question: This sūtra fully clarifies various meanings; why does it speak exclusively of Great Nirvāṇa? Answer: Nirvāṇa is the central theme, and therefore it is spoken of exclusively; or it may be said that the various meanings cannot all be made apparent at once, so nirvāṇa is provisionally adduced. The syllable [vā]nā means "resting," which is here omitted for brevity. Resting has three meanings: first, resting the causes and fruits of conditioned birth-and-death and entering into the unconditioned is called resting; second, resting practice and tallying with reality is called resting, which is why the text below says, "If one is able to sever the practices of the thirty-seven factors [of awakening], this is called nirvāṇa"; third, resting transformation and returning to reality is called resting. This adduces that which is expressed.