Discipline makes hard men. Every hard man is capable of being a killer. But every killer is not capable of being a hard man. They can't endure that much. It's all about the endurance. That's why they become killers. Because they can't endure the pain. They need to kill the pain to stop it.

Without struggle, there is no progress. There has to be struggle in your life. You have to grow in experience to control your ego. Cause, you know, an ego can be crushed, it can be killed, it can be smashed, but it comes back. It never dies. That's the thing about the ego: it never dies.

I'm just a sucker even talking to you guys. I should be ready to rip your heads off your necks. But it's just not the right thing to do

When you're a great finisher, you'll become popular. Joe Louis was a great finisher.

I am the most ruthless, brutal champion ever. There is no one who can match me. I want your heart. I want to eat your children.

They called me a 'rapist' and a 'recluse.' I'm not a recluse.

It's the emotional punches that you can't see that are just overwhelmingly devastating to your heart - your moral fiber.