I haven’t the slightest idea how to change people, but still I keep a long list of prospective candidates just in case I should ever figure it out.

Sedaris’s line turns a familiar human impulse—wanting others to behave differently—into self-mocking comedy. The speaker admits total incompetence at “changing people,” yet still maintains a “long list” of those who ought to be improved, exposing how persistent and judgmental that impulse can be. The humor comes from the gap between the grand, reformist ambition and the petty, bureaucratic image of keeping “prospective candidates,” as if personality renovation were a future project. Beneath the joke is a small ethical nudge: since we can’t reliably remake others, the urge to do so is often more about our own control, irritation, or fantasies of order than about anyone else’s good.