Respectfully Quoted: A Dictionary of Quotations. 1989.
Calvin Coolidge (18721933)
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 are omnipotent. The slogan press on has solved and always will solve the problems of the human race.
Attributed to CALVIN COOLIDGE. Unverified, though this appeared on the cover of the program of a memorial service for him in 1933. The Forbes Library, Northampton, Massachusetts, has searched its Coolidge collection many times for this.