Watch ! The Strangest Secret / The 30 Day Challenge (1956) by Earl Nightingale

Master Key Society
Description:
In 1950 Earl Nightingale was inspired by the words "we become what we think about" in Napoleon Hill's book Think and Grow Rich around the same time he bought an insurance agency. He provided weekly motivational speeches to the agency's sales staff. In 1956, he recorded a motivational speech to be played while he was on vacation.

"Before listening to this recording, I want you to realize, that...
Your job, regardless of what it may be, holds within it the KEY to success and abundance. This recording, 'The Strangest Secret', gives you that KEY...tells you how to make the most of your own capabilities...how to attain the rich full measure of success and happiness that can surely be yours. You and you alone determine the DEGREE of your success. By following the principles set forth in this recording, you are bound to achieve a better way of life...starting now!" - Earl Nightingale