My former writing teacher, the essayist and cartoonist Timothy Kreider, explained revision to me: “One of my favorite phrases is l’esprit d’escalier, ‘the spirit of the staircase’ — meaning that experience of realizing, too late, what the perfect thing to have said at the party, in a conversation or argument or flirtation would have been. Writing offers us one of the rare chances in life at a do-over: to get it right and say what we meant this time.