People see it [boxing] as a physical contact sport, but it's not. It's really a spiritual one of will against will. Who wants it the most? How much is he willing to take - and dish out - to get it? It's like fighting is 10 percent physical and 90 percent emotional.

When I was young, I thought I was a god. Now, I just basically work on staying humble. My priorities changed. Just to be able to try to change them - that was frightening to me.

Fear is the greatest obstacle to learning. But fear is your best friend. Fear is like fire. If you learn to control it, you let it work for you. If you don’t learn to control it, it’ll destroy you and everything around you. Like a snowball on a hill, you can pick it up and throw it or do anything you want with it before it starts rolling down, but once it rolls down and gets so big, it’ll crush you to death. So one must never allow fear to develop and build up without having control over it, because if you don’t you won’t be able to achieve your objective or save your life.

When Jesus comes back, these crazy, greedy, capitalistic men are gonna kill him again.

I just don't have the desire no more, I don't have the stomach to do it no more. I don't even kill insects in my house. I just don't kill anything no more. I used to kill pigeons, rip their heads off, 'You dirty rat pigeon!' I don't even have the heart to kill an animal no more. I just changed my whole life in general. That probably could have changed the way I fight.

I don't have to be that gentleman ["baddest man on the planet"] anymore. Now I have to be "this" guy. And in order to be "this" guy, I have to be smiling, I have to be gregarious, I have to be entertaining, and I have to be friendly. This is what my career needs now. I've adapted. But 20 years from now, I may need a different persona.

I'm the biggest fighter in the history of the sport. If you don't believe it, check the cash register.