You should do it against the clock. Say you are going to do 30 laps in 15 minutes. Then you try to do it each day a little faster. That is putting demands on the body, and that is how you build up. You keep up your energy instead of going downhill.

Better to wear out than rust out.

If you can't afford a half hour three or four times a week taking care of the most priceless possession, your body, you've got to be sick. You're stupid.

I've never been satisfied with myself, ever. But I feel good about myself, because I'm truthful. I don't corrupt myself. I'm also a perfectionist. I'm very impatient. I've got energy and drive and I can't stand inefficiency in people. And I can't stand dumb people. Why surround yourself with people who are going to tie you down? I don't suffer fools.

I do it as a therapy. I do it as something to keep me alive. We all need a little discipline. Exercise is my discipline.

You got to do what's happening today in the world. You got to keep up with time. Keep up to date, keep modern - keep up on your toes!

Never get satisfied. The minute you stop trying, you go downhill.