Stay in college, get the knowledge. And stay there until you're through. If they can make penicillin out of moldy bread, they can sure make something out of you. Advice to a young person to continue his education.

At home I am a nice guy: but I don't want the world to know. Humble people, I've found, don't get very far.

I said I was the greatest, not the smartest.

I'm The Greatest, but only in relation to fighting.

This relationship will help guarantee that, for generations to come, people of all nations will understand my beliefs and my purpose

The bull is stronger, but the matador is smarter.

When you're right, nobody remembers. When you're wrong, nobody forgets.