I've walked by this quote a million times without ever having stopped and read it. Fortunately, for some reason, I took notice. The full quote is below. This is the code by which I live (or at least try to live). I think it speaks more truth than we are even able to realize.
"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