I had it in my mind: to be confident, and to keep saying that until the confidence appeared. But I took it too far. Confidence did help make me champion, but, man, I took it to a whole different level. I was a megalomaniac. I was not humble and it eventually came back on me. So I want my kids to know, keep humbleness and kindness in their hearts. It will prevail.

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.

Everybody you fight is not your enemy and everybody who helps you is not your friend.

I earned that the strong will always beat the weak, but the smart will beat the strong. Boxing is a tough guy sport. But in the end, the tough guy gets to clean the streets and be a bodyguard. In the ring, the tough guy is going to get hurt; at the end of the day, he's going to talk funny. Only the smartest win. So, I know it's cliché, but power - real power - comes from knowledge, comes from smarts.

I don't react to a tragic happening any more. I took so many bad things as a kid and some people think I don't care about anything. It's just too hard for me to get emotional. I can't cry no more.

I'm a bad guy. But if I was a good guy, nobody would want to pay to see me fight.

You have to be a friend to yourself. You know, 'cause if you're not a friend to yourself, you're an enemy to yourself and if someone's a friend of everybody they are an enemy to themselves.