I figured that if I said it enough
I would convince the world
That I really was the greatest.
Muhammad Ali

Yes.  He was the greatest.  And we all knew it.  And, it was his repetition of that famous phrase, ‘I am the greatest,’ that made us believe it.

Like most athletes, Muhammed Ali understood the importance of affirmation.  But he took affirmations to greater heights than any athlete before or since.  And before Ali could make us believe that he was the greatest he had to believe it himself.