You probably already heard that Muhammad Ali passed away today at age of 74. You may know that he was one of the most significant American boxers, but he was much more than that. He had a strong voice in politics, religion and popular culture. He was not only an athlete, but also an activist, humanitarian, poet and showman with a statement that caught the mood of many people. Here are some of Ali’s own words to remember him by:

Float like a butterfly, sting like a bee.

He who is not courageous enough to take risks will accomplish nothing in life.

The man who views the world at 50 the same as he did at 20 has wasted 30 years of his life.

Service to others is the rent you pay for your room here on earth.

I am the greatest, I said that even before I knew I was.

I know where I'm going and I know the truth, and I don't have to be what you want me to be. I'm free to be what I want.

The man who has no imagination has no wings.

It isn't the mountains ahead to climb that wear you out; it's the pebble in your shoe.

Silence is golden when you can't think of a good answer.

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

It's the repetition of affirmations that leads to belief. And once that belief becomes a deep conviction, things begin to happen.

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

It's hard to be humble, when you're as great as I am.