This excerpt is from the book "Psycho-Cybernetics" by Maxwell Maltz, M.D., a pioneering work in the field of self-improvement. The book argues that the most important psychological discovery of modern times is the self-image, which is the mental blueprint or picture we have of ourselves. This image is formed from our past experiences and beliefs, and it influences our behavior, actions, and even our circumstances. The book explains how to dehypnotize ourselves from false beliefs and negative self-images, and to strengthen our self-image to create a more positive and successful life. The book also explores emotional intelligence and how to manage emotions, overcome challenges, and build resilience. It emphasizes the power of imagination as a tool for change and achieving success, as well as the importance of rational thinking to overcome negative mental habits.