Persistence

"Nothing in the world can take the place of persistence.  Talent will not; nothing is more common than unsuccessful men with talent.  Genius will not; unrewarded genius is almost a proverb.  Education will not; the world is full of educated derelicts.  Persistence and determination alone are omnipotent.  The slogan Press On! has solved and always will solve the problems of the human race." -- Calvin Coolidge