You may recognize Hill as the author of the classic Think and Grow Rich. First published in 1937, the book’s message about gaining monetary success through visualization, hard work and a positive attitude, still holds true today. Even more compelling than that book though, is the sequel Grow Rich—with Peace of Mind, which was published 40 years after the original. In 1967, an 84-year old Hill had come to a slightly different conclusion about the role of work in our lives and what success truly meant. It seems that after a lifetime of fame, riches and service as an advisor to three presidents, the elderly Hill began to whistle a different tune: be successful—but have a life, too.