There are several, of course. But this one might be the most important. Good things are coming.
“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 will always solve the problems of the human race.”
—Calvin Coolidge (1872-1933), 30th U.S. president