A compilation of Napoleon Hill's teachings of science of success theory, now focusing on the five major principles among his seventeen, in a series of radio talk-show and question and answer format. It's been always a welcome and easier thing to remember the gist of Mr. Hill's calling with the essential of the essentials, and impressed the most when examples were given (Edison, Ford, Wright Brothers) for the five major principles - Definiteness of Purpose, The Mastermind, Applied Faith, Going the Extra Mile, Creative Vision. It helps when you have read the author's classics first like "Think and Grow Rich" and this book would give you fresher outlook, clearer vision and workable ideas about the principles, if you find some of the concepts rather abstract or vague. Mr. Hill always claims the science is a practical philosophy of personal success, a system to transmute burning desires into reality by its application, making life a resourceful one, while at the same time, it is an applied faith in Christianity. This book is an important recording of Mr. Hill's success philosophy, in his own words, which introduces ether and Unlimited Intelligence, and their relationship to men's subconscious mind. Personally, I am a believer in Mr. Hill's system and can vouch for the changes brought by it since I started to read his books and practice his teachings about ten years ago. Highly recommended.