"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
This quotation is a bit long, but I remind myself of this quotation daily because there so many times during the day when I don't want to finish something, but this quote presses me on. Persistence will take you places not talent alone.