"Service to others is the rent you pay for your room here on earth." - Muhammad Ali

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

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

"It's not bragging if you can back it up." - Muhammad Ali

"Age is whatever you think it is. You are as old as you think you are." - Muhammad Ali

"Don't count the days; Make the days count." - Muhammad Ali

"If they can make penicillin out of moldy bread, they can sure make something out of you." - Muhammad Ali

"Live every day as if it were your last because some day you are going to be right." - Muhammad Ali

Muhammad Ali (born Cassius Clay) may be best known as a boxer, and remembered for his catchy rhymes, but he was also the 2005 Presidential Medal of Freedom award recipient.