I gave up playing chess about the same time I picked up snowboarding, but I've always admired those who could sweat buckets just by thinking. One such athlete is Garry Kasparov, the long-time #1-ranked player in the world and nemesis of IBM's Deep Blue. Here's his take on life at a grand-master level:
"Ultimately, what separates a winner from a loser is the willingness to do the unthinkable. Intelligence without audaciousness is not enough."