I think exercise tests us in so many ways, our skills, our hearts, our ability to bounce back after setbacks. This is the inner beauty of sports and competition, and it can serve us all well as adult athletes.
I mean, I can tell within the first two minutes if I'm into someone or not. I can always tell if I get butterflies.
So much of a professional athlete's success depends upon not necessarily the play itself but how he deals with... always saying how you deal with good, is just as important as how you deal with bad.