At the dawn of modern psychology, Charles Baudouin set out to demystify one of the most profound forces in human life: the power of suggestion. This is not a book about mind control or quick fixes. It is a careful, sympathetic, and rigorously argued exploration of how ideas, whether whispered by others or repeated in our own minds, shape our thoughts, feelings, and actions. In *Suggestion and Autosuggestion*, Baudouin distills the principles of the Nancy School—laws that govern attention, effort, and the unconscious—into a practical and philosophically rich system. Our modern edition brings this foundational work into clear, accessible contemporary English, preserving its intellectual honesty and humane wisdom while freeing it from dated phrasing and awkward translation. Whether you are a student of psychology, a coach, a therapist, or simply a curious reader seeking to understand the hidden architecture of your own response to life, this book is an invitation to see how suggestion works—and to use it wisely, not as a trick, but as a tool for genuine growth. Part of The Modern Wisdom Library.