the pre-suicide hours are conceit, not generosity
Among pernicious myths is the one where people always get very upbeat and generous and other-directed right before they eliminate their own map for keeps. The truth is that the hours before a suicide are usually an interval of enormous conceit and self-involvement.
Context
The scene's flat correction of a sentimental myth, and it doubles as a diagnosis of the addicted-suicidal state: the final hours are not tender and outward-turned but a peak of self-involvement, the mind entirely occupied with itself and its exit. The observation is delivered with the same clinical evenness the litany uses, refusing the consolation that the ending is anything but self-absorbed.