大般涅槃經義記 3.265

3.265

第四句中，「我若說言如來常者即是我見，有無量罪」畏樂為苦，「是故應」下取苦為樂，取彼顛倒罪苦為樂。言是故者，是說佛常有無量罪。「故應說佛無常」，說佛無常謂當道理，是以復言「如是說者我即受樂」。

In the fourth clause, 'If I say that the Tathāgata is permanent, that is just the view of self, which brings immeasurable guilt' is to fear bliss as suffering. From 'Therefore one should' downward is to grasp suffering as bliss—grasping that inverted guilt and suffering as bliss. Saying 'therefore' refers to the immeasurable guilt of saying the Buddha is permanent. 'Therefore one should say that the Buddha is impermanent': saying that the Buddha is impermanent is taken to accord with the principle, and thus it further says, 'If one speaks thus, I will immediately experience bliss.'