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 failures. Persistence and determination alone are omnipotent. – Calvin Coolidge

No enterprise can exist for itself alone. It ministers to some great need, it performs some great service, not for itself, but for others or failing therein, it ceases to be profitable and ceases to exist. – Calvin Coolidge