Find Your Purpose

As it has been said by Mark Twain: "Twenty years from now you will be more disappointed by the things that you didn't do than by the things you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade wins in your sails." 

Understand what you want in life, and then, I think you would become the greatest. Proving this point is quite simple, just take away the purpose of the most famed people and you would find that they would have nothing left.

“To succeed in life, you need two things: ignorance and confidence." - Mark Twain

Be the best Human Being the world has ever had and probably the world will 'ever' have. 

Good Luck!