In this book we have given you the essence, substance, gist, and spirit of the best teachings concerning the Solar Plexus, or Abdominal Brain, -teachings both Oriental and Occidental, both ancient and modern. The instruction has been condensed and compressed into a small space, and, therefore must be most carefully read and studied in order to obtain the full contents thereof. We ask you to read and re-read this book a number of times; taking it up from time to time to refresh your memory concerning its teachings. The subject is an important one, and the methods and instruction given you herein are practical and easily applied. Here you have the gist of the Solar Plexus Teaching stated in condensed form, without fanciful trimming, fringes, or additions attached in order to make the teachings "fit in" with some particular metaphysical theory. (William Walker Atkinson, The Solar Plexus) William Walker Atkinson (1862-1932) was a prolific writer. His works treat themes related to the mental world, occultism, divination, psychic reality, and mankind's nature. They constitute a basis for what Atkinson called "New Psychology" or "New Thought".