Platitude or truth?

"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 alone are omnipotent. The slogan, 'Press on,' has solved and always will solve the problems of the human race." —Calvin Coolidge

Sobel's biography

Greenburg's biography

Coolidge and persistence - Jack Barry's great book - Rising Tide: The Great Mississippi Flood of 1927 and how it changed America