Here are some of my favorite quotes from boxing legend Muhammad Ali:

1- “A man who views the world the same at 50 as he did at 20 has wasted 30 years of his life.”

2- “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.”

3- “Service to others is the rent you pay for your room here on earth.”

4- “The man who has no imagination has no wings.”

5- “I have said I’m the greatest. Ain’t nobody ever heard me say I’m the smartest.”