The potential for greatness lives within us all.

What do you do after you are world-famous and nineteen or twenty and you have sat with prime ministers, kings and queens, the Pope? Do you go back home and take a job? What do you do to keep your sanity? You come back to the real world.

I had a series of childhood illnesses... scarlet fever.... pneumonia.... Polio. I walked with braces until I was at least nine years old. My life wasn't like the average person who grew up and decided to enter the world of sports.

When I was going through my transition of being famous, I tried to ask God, why was I here? What was my purpose? Surely, it wasn't just to win three gold medals. There has to be more to this life than that.

I tell them that the most important aspect is to be yourself and have confidence in yourself.

Winning is great, sure, but if you are really going to do something in life, the secret is learning how to lose. Nobody goes undefeated all the time. If you can pick up after a crushing defeat, and go on to win again, you are going to be a champion someday.

It doesn't matter what you're trying to accomplish. It's all a matter of discipline. I was determined to discover what life held for me beyond the inner-city streets.