This is one of my favourite quotes of all time.
I first found this quote on Book: Grinding It Out: The Making of McDonald and then The Founder 2016, a biographical drama film of Ray Kroc, an American businessman. It portrays the story of his creation of the McDonald's fast-food restaurant chain.
Calvin Coolidge's quote on Persistence
“Nothing in this 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 always will solve the problems of the human race.”
Explore more:
Book: Grinding It Out: The Making of McDonald, originally published in 1977, also available on Amazon.com in hard copy, eBook and audiobook.
Film: The Founder, 2016
Audiobook: The Power of Persistence by Calvin Coolidge