To be ambitious for wealth, and yet always expecting to be poor; to be always doubting your ability to get what you long for, is like trying to reach east by travelling west. There is no philosophy which will help a man to succeed when he is always doubting his ability to do so, and thus attracting failure. No matter how hard you work for success, if your thought is saturated with the fear of failure, it will kill your efforts, neutralize your endeavors and make success impossible.
A great manager has a knack for making ballplayers think they are better than they think they are. He forces you to have a good opinion of yourself. He lets you know he believes in you. He makes you get more out of yourself. And once you learn how good you really are, you never settle for playing anything less than your very best.