Guts
People in France have a phrase "Spirit of the stairway." In French: Esprit d'Esclier. It means that moment when you find the answer but it's to late. Say that you are at a party and someone insults you. You have to say something. So, under pressure, with everybody watching, you says something lame. But the moment you leave the party. . . As you start down the stairway, then MAGIC. You come up with the perfect thing you should have said. That's the Spirit of the Stairway.