Persistence

"Nothing in the world can take the place of persistence. Talent will not; nothing is more uncommon that unsuccessful men with talent. Genius will not; unrewarded genius is almost a proverb. Education alone will not; the world is full on educated derelicts. Persistence and determination alone are omnipotent. The slogan "press on" has solved and will always solve the problems of the human race."

John Calvin Coolidge

Quite often I have to remind myself to keep going no matter how discouraged I get, because even though I can't always see the payoff, I know that God will provide and in the end, it'll be all worth it.