The Secret Order of Pythagoras is a book written by Aug. C. L. Arnold that delves into the esoteric and mystical teachings of the ancient Greek philosopher Pythagoras. The book explores the history and philosophy of Pythagoras, as well as his teachings on mathematics, music, and the nature of reality. Arnold also discusses the influence of Pythagorean thought on later thinkers, such as Plato and Aristotle, and how it has shaped our understanding of...