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.

Tupac Shakur always wanted me to smoke weed with him, and I never did it, and I wish I did...That's my biggest regret.

Boxing brought me money and fame, but it never brought me no happiness.

Every great general and warrior from the beginning of time was high.

If you did everything your mind told you to do, you do some really strange stuff. You'll probably be in jail, you'll be in trouble. But, it's all about control. We all have to control our feelings. That's the thing that separates us from animals.

It's nothing personal, but I'm going to kill this guy

Without discipline, no matter how good you are, you are nothing! One day, and I might not be around; you're going to meet a tough guy who takes your best shot. He'll keep coming because he's tough. Don't get discouraged. That's when the discipline comes in.