I am the greatest. I said that even before I knew I was. Don't tell me I can't do something. Don't tell me it's impossible. Don't tell me I'm not the greatest. I'm the double greatest.

There's nothing stressful about turning 50 except people reminding you about it.

The roughest and toughest fighter I fought was Joe Frazier

I just felt the power and the meanness of the man I was messing with.

I can't believe some of the things I did.Can't believe it. Sayin' I was the greatest and the beautifulist and I was gonna whup this guy and that guy, sayin' I'm pretty, I can't be beat.

You know I hate fighting. If I knew how to make a living some other way, I would.

I won the Olympic gold medal in Rome, Italy. Olympic champion. The Russian standing right here, and the Pole right here.