The Science of Mind is Holmes' magnum opus. In it, Holmes brings a scientific approach to his explanation of the nature of reality, the nature of the consciousness, and the role of consciousness in creating reality. Holmes utilizes empirical rigor and practical logic in mapping the mechanizations of the human mind. He covers the relationship of spirt to mind, and mind to spirit. Other topics include mental discipline, meditation, the law of attraction, the power of focus, the power of word, visualization, and much more. This book is a benchmark of the New Thought movement and has influenced countless writers since its publication.