“Why the fuck are you running a half-marathon?” I asked. “You’re already training, so why not a full marathon?” He tripped over his tongue trying to come up with a satisfying answer, but I already knew why. He was training for something he knew he could do. I’m not picking on him. That’s how most of the world operates. Very few individuals step outside the box and attempt to stretch their limits. They rule out the spectacular by default. They put a hard cap on their own performance way before game day.