"I am the greatest, I said that even before I knew I was"

In this quote, Muhammad Ali is expressing his self-confidence and self-belief. He declares himself as the greatest, even before he totally realized his own potential. This declaration shows his steady decision and belief in himself, in spite of any doubts or obstacles he may have dealt with. It also highlights his humility, as he acknowledges that his achievement was not something he was born with, however rather something he worked hard to achieve. This quote functions as a pointer to always think in oneself and to never ignore one's own abilities. It is a testament to Ali's famous status as a boxer and as a symbol of determination and self-belief.