The ultimate goal of discipline is to teach self discipline.
There is always someone better than you. Whatever it is that you do for a living, chances are, you will run into a situation in which you are not as talented as the person next to you. That's when being a competitor can make a difference in your fortunes.
Silence is a form of communication, too. Sometimes less is more.
Combine practice with belief.
Coaches who start listening to fans often wind up sitting next to them.
Hard work breeds self-respect.