“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
“The Drunkard's Walk: How Randomness Rules Our Lives” by Leonard Mlodinow offers the following nugget:
Successful people in every field are almost universally members of a certain set—the set of people who didn't give up.
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