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 derelicts. Persistence and determination alone are omnipotent.
– Calvin Coolidge, 30th President of the United States
Two diet books in one, and both require persistence and determination
Advanced Mediterranean Diet 