It's hard to be humble when you're as great as I am.
The man who views the world at 50 the same as he did at 20 has wasted 30 years of his life.
The Service you do for others is the rent you pay for your room here on Earth.
The man with no imagination has no wings.
Often it isn't the mountains ahead that wear you out, it's the little pebble in your shoe.
The best way to make your dreams come true is to wake up.
Champions aren't made in gyms. Champions are made from something they have deep inside them-a desire, a dream, a vision. They have to have the skill, and the will. But the will must be stronger than the skill.
I hated every minute of training, but I said, 'Don't quit. Suffer now and live the rest of your life as a champion'.
Friendship is the hardest thing in the world to explain. It's not something you learn in school. But if you haven't learned the meaning of friendship, you really haven't learned anything.
I figured that if I said it enough, I would convince the world that I really was the greatest.
I Ain't Got No Quarrel With The VietCong… No VietCong Ever Called Me Nigger.
Go to College, Stay in school, If they can make penicillin out of mouldy bread, they can sure make something out of you.
The fight is won or lost far away from the witnesses, behind the lines, in the gym, and out there on the road; long before I dance under those lights.
I am the greatest, I said that even before I knew I was.
Terrorists are not following Islam. Killing people and blowing up people and dropping bombs in places and all this is not the way to spread the word of Islam. So people realize now that all Muslims are not terrorists.
It isn't the mountains ahead to climb that wear you out; it's the pebble in your shoe.
Friendship... is not something you learn in school. But if you haven't learned the meaning of friendship, you really haven't learned anything.
I shook up the world, I shook up the world.
Ali's got a left, Ali's got a right - when he knocks you down, you'll sleep for the night; and when you lie on the floor and the ref counts to ten, hope and pray that you never meet me again.
Go up in an airplane. Go high enough, and it's like we don't even exist.
I've been everywhere in the world, seen everything, had everything a man can have.
Joe Frazier got hit more than me - and he doesn't have Parkinson's.
I've made my share of mistakes along the way, but if I have changed even one life for the better, I haven't lived in vain.
Life is so, so short. Bible says it's like a vapor.
The only thing that matters is submitting to the will of God.
I wanted to use my fame and this face that everyone knows so well to help uplift and inspire people around the world.
I give thanks to God and to all the people in the U.K. who have supported me over the years.
Joe Frazier is so ugly that when he cries, the tears turn around and go down the back of his head.
I done wrestled with an alligator, I done tussled with a whale; handcuffed lightning, thrown thunder in jail; only last week, I murdered a rock, injured a stone, hospitalised a brick; I'm so mean I make medicine sick.
I've seen George Foreman shadow boxing, and the shadow won.
To make America the greatest is my goal, so I beat the Russian and I beat the Pole. And for the U.S.A. won the medal of gold. The Greeks said, 'You're better than the Cassius of old.'
When I won the Golden Gloves in 1960, that made me realize I had a chance. And when I won at the Olympics, that sealed it: I was the champ.
I would say things like 'I am the greatest! I'm pretty! If you talk jive, you'll drop in five! I float like a butterfly, sting like a bee! I'm pretty!' When white people heard me talking like this, some said, 'That black man talks too much. He's bragging.'
You think the world was shocked when Nixon resigned? Wait till I whup George Foreman's behind.
The fact is, I was never too bright in school. I ain't ashamed of it, though. I mean, how much do school principals make a month?
Never put your money against Cassius Clay, for you will never have a lucky day.
People don't realize what they had till it's gone. Like President Kennedy, there was no one like him, the Beatles, and my man Elvis Presley. I was the Elvis of boxing.
It's in my blood to be around people while I was training.
I didn't want to submit to the army and then, on the day of judgment, have God say to me, 'Why did you do that?' This life is a trial, and you realize that what you do is going to be written down for Judgment Day.
I used to tease Joe Louis by reminding him that I was the greatest of all time. But Joe Louis was the greatest heavyweight fighter ever.