To be honest, I don't know. I started one [book] back in 1982 or '83 when I first retired. But I was only 25 or 26 and not ready to write my memoirs.

Within our dreams and aspirations we find our opportunities.

You have to know you can win. You have to think you can win. You have to feel you can win.

People can do more than they ever believe they can do. Physically, mentally, academically. You have to be pushed. It hurts. But it's worth it, and it's a great thing.

Bruce Lee was an artist and, like him, I try to go beyond the fundamentals of my sport. I want the public to see a knockout in the making.

Boxing brings out my aggressive instinct, not necessarily a killer instinct.

Success is attaining your dream while helping others to benefit from that dream materializing.

I've always believed that you can be whatever you want to be if you are willing to sacrifice and dedicate yourself.

My toughest fight was myself. For me to disclose and let things out was not easy because we don't want to seem weak or like we are different, but I learned that it's okay.

I consider myself blessed. I consider you blessed. We've all been blessed with God-given talents. Mine just happens to be beating people up.

Inactivity is the biggest sin in boxing.

A good story is always more dazzling than a broken piece of truth.

I believe in recovery and I believe that as a role model I have the responsibility to let young people know that you can make a mistake and come back from it.

I feel a very unusual sensation - if it is not indigestion I think it must be gratitude.

If we are to understand anything of the human mind we must approach the people of the past with humility rather than an overconfident superiority.

The people must have amusement as well as religion...every pure enjoyment is from heaven.

I never sing in the shower. It's very dangerous.

If you lose self-control everything will fall.

Pigmentation was a quick and convenient way of judging a person. One of us, Dr. Martin Luther King, Jr., once proposed we instead judge people by the content of their character. He was shot.

Here is an unspeakable secret: paradise is all around us and we do not understand.

Flying helicopters is what I do for fun.