persistance

"Nothing in this world can take the place of persistence. Talent will not;
nothing is more common than unsuccessful people 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.