I have this quote hanging in my office at work. I've had it for over a decade. I walk by it every day, but re-read it again yesterday. It sums up my 2010 race season (I finished my last two races injured because I was too stubborn, I mean persistent, too give up), and life in general right now.
“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"