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.

Sometimes, the people we invest the most time in disappoint us the most.

My life's not tragic at all. How many guys do you know who are bankrupt and just bought a $3 million house and are getting ready to get $6 million more?

There's nothing to fear but fear itself. It's an illusion of fear. Fear is an illusion. If you gonna die, you gonna die anyway; it's not something to fear, fear is not gonna help.

I'm not a Republican, but I have some conservative views on certain things. I'm not a Democrat, either. It's just very difficult that these people hate each other over a belief. I think it all comes down to ego and competitiveness.

It's interesting that you put me in the league with those illustrious fighters [Muhammad Ali, Joe Louis, Jack Johnson], but I've proved since my career I've surpassed them as far my popularity. I'm the biggest fighter in the history of the sport. If you don't believe it, check the cash register.

I'm here to serve God and be of service. I'm nothing; everything out here is a lot bigger than me.