"What you're thinking is what you're becoming."
Muhammad Ali is seen prior to the first round of his title fight against heavyweight contender Ken Norton, shouting "Norton must fall" at Yankee Stadium in New York on Tuesday, September 28, 1976. Days later on Friday, October 1, in Istanbul, Ali told a crowd of reporters and photographers that "as of now, I am quitting boxing and will devote all my energy to the propagation of the Muslim faith."