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, 1932(?)
I'm not really a fan of Coolidge, but this quote is worth paying attention to.
"...unrewarded genius is almost a proverb."