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Float like a butterfly, sting like a bee.

It ain't over till it's over.

I hated every minute of training, but I said, 'Don't quit. Suffer now and live the rest of your life as a champion.'

The fight is won or lost far away from witnesses - behind the lines, in the gym, and out there on the road, long before I dance under those lights.

I'm not the greatest, I'm the double greatest. Not only do I knock 'em out, I pick the round.

I've wrestled with alligators, I've tussled with a whale. I done handcuffed lightning and thrown thunder in jail.

Champions aren't made in the gyms. Champions are made from something they have deep inside them, a desire, a dream, a vision.

I am the astronaut of boxing. Joe Louis and Dempsey were just jet pilots. I'm in a world of my own.

I shook up the world!

I'm so fast that last night I turned off the light switch in my hotel room and was in bed before the room was dark.