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.

People who are born round don't die square.

Fear is like fire. You can make it work for you: it can warm you in the winter, cook your food when you're hungry, give you light when you are in the dark, and produce energy. Let it go out of control and it can hurt you, even kill you... Fear is a friend of exceptional people... You must understand fear so you can manipulate it.

To see a man beaten not by a better opponent but by himself is a tragedy.

I believe nature's a lot smarter than anyone thinks. During the course of a man's life he develops a lot of pleasures and people he cares about. Then nature takes them away one by one. It's her way of preparing you for death.

The hero and the coward both feel the same thing, but the hero uses his fear, projects it onto his opponent, while the coward runs. It's the same thing, fear, but it's what you do with it that matters.

When you get hit that's when you've got to be calm. A professional fighter has to learn how to hit and not get hit, and at the same time be exciting. That's what professional boxing is about. You've got to be clever, you've got to be smart, and not get hit, and when you're able to do this, you're a fighter.