The strangest secret in the world is that you become what you think about.

Earl Nightingale V (1921 CE-1989 CE), Earl Nightingale was an American radio speaker and author, dealing mostly with the subjects of human character development, motivation, and meaningful existence. Nightingale was the author of The Strangest Secret, which economist Terry Savage has termed "…one of the great motivational books of all time." During his lifetime, Nightingale wrote and recorded more than 7,000 radio programs, 250 audio programs as well as television programs and videos.