A classic quote from Sports Illustrated on confidence:
"Greg Harden, a long-time employee of the Michigan football program who advises and counsels Michigan players, says Drew Henson (the favored child who competed with Tom Brady for the Michigan quaterback job before Brady became a megastar) was like Superman, Tom Brady was like Batman.
Batman doesn't have any superpowers, but as Harden says, "Batman believes he can whip Superman's ass."
Pretty interesting quote on confidence. Read the whole article on who Tom Brady was before stardom here.