And then we move on. We start writing about the new guy. Or how much MPs have been claiming for their paper clips. But for the person who has resigned, their life has changed. They know the political caravan will move out. What they don’t know is whether they will move with it. They may come back. Or they may not. Someone younger, or brighter, or more interesting may come along. Their principled sacrifice may be forgotten over the course of time. Or it may become tainted. Viewed as a little bit self-indulgent, or self-aggrandising.