大般涅槃經義記 3.268

3.268

次明苦倒，「樂生苦想名為顛倒」總以標舉。次廣釋之，於中三句：一迷樂計苦，「樂即如來」辯其所迷，道言「苦者如來無常」明其所立，「若說」已下牒以結之。二破樂成苦，「如來常住是名為樂」反以縱立，「若我說常，云何復得入於涅槃」舉應難破；三難破非苦成佛非樂，「若言非苦」舉他所立，「云何捨身而取滅度」舉應難破。

Next, to explain the inversion of suffering, 'Conceiving suffering within bliss is called inversion' states the general heading. Next, it explains it at length, within which there are three clauses: First, being deluded about bliss and calculating it as suffering: 'Bliss is the Tathāgata' clarifies that about which one is deluded, saying 'Suffering is the Tathāgata's impermanence' clarifies what is established, and from 'If one says' downward quotes and concludes it. Second, refuting bliss and establishing suffering: 'The Tathāgata is eternally abiding; this is called bliss' conversely grants and establishes it; 'If I say permanent, how could he again enter into nirvāṇa?' adduces the responsive manifestation to challenge and refute it. Third, challenging and refuting [the view of] non-suffering to establish that the Buddha is not bliss: 'If one says it is not suffering' adduces what the other establishes; 'Why abandon the body and take extinction?' adduces the responsive manifestation to challenge and refute it.