I found it. Here it is.
Published in · 3 min read · Mar 1, 2020
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Author Napoleon Hill refers to a “secret” that runs throughout his 1937 self-help book Think and Grow Rich. This secret, he writes, appears at least once in every chapter. But he does not specifically name the secret.
Hill writes that it is more beneficial and penetrating for you to arrive at the secret yourself. Some readers, he says…