Standard discussions of prudence treat it as requiring time-slice management. That this is the standard view of prudence can be seen by its presence in two seemingly opposed positions on prudence, those of Thomas Nagel and Derek Parfit. I argue that this kind of view fails to properly appreciate the difficulty with being prudent, treating imprudence as a kind of theoretical mistake. I then offer a characterization of prudence as integrity, the holding together of disparate but temporally extended parts of the self in a manner that makes the act of reasoning possible.