It's not that I'm so smart, it's just that I stay with problems longer.
Success is a lousy teacher. It seduces smart people into thinking they can't lose.
Be as smart as you can, but remember that it is always better to be wise than to be smart.
A smart man makes a mistake, learns from it, and never makes that mistake again. But a wise man finds a smart man and learns from him how to avoid the mistake altogether.
Roy H. Williams
A man must be big enough to admit his mistakes, smart enough to profit from them, and strong enough to correct them.
John C. Maxwell