Think and Grow Rich was written by Napoleon Hill and promoted as a personal development and self-improvement book. While the book’s title and much of the text concerns increasing income, the author insists that the philosophy taught in the book can help people succeed in any line of work, to do and be anything they can imagine. Hill studied their habits and evolved 16 “laws” to be applied to achieve success. Think and Grow Rich condenses them, providing the reader with 13 principles in the form of a “Philosophy of Achievement”. Mark Hansen has said time has shown that two of the laws/principles are most important. The Mastermind principle/process “Know very clearly where you want to go.” The 13 “steps” listed in the book are: Desire Faith Autosuggestion Persistence Decision Imagination Organized Planning Power of the Mastermind The Mystery of Sex Transmutation Specialized Knowledge The Subconscious Mind The Brain The Sixth Sense.