Calvin Coolidge

"All growth depends upon activity. There is no development physically or intellectually without effort, and effort means work."

"Press on: nothing in the world can take the place of perseverance. Talent will not; nothing is more common than an 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."

"Persistence and determination alone are omnipotent."