After defeating Sonny Liston for the first time (25 February 1964) as quoted in Sound and Fury : Two Powerful Lives, One Fateful Friendship (2007) by Dave Kindred, p. 58<br>Variant transcription: I'm the greatest thing that ever lived. I'm so great I don't have a mark on my face. I shook up the world.<br>As quoted in "When Clay shook up the world" (24 February 2004) http://news.bbc.co.uk/sport1/hi/boxing/3516241.stm <br class="br">Context: I knew I had him in the first round. Almighty God was with me. I want everyone to bear witness, I am the greatest! I'm the greatest thing that ever lived. I don't have a mark on my face, and I upset Sonny Liston, and I just turned twenty-two years old. I must be the greatest. I showed the world. I talk to God everyday. I know the real God. I shook up the world, I'm the king of the world. You must listen to me. I am the greatest! I can't be beat!