The Key to Yourself will take you into a new world of accomplishment, prosperity, friends and pleasure. It will give you a golden return if you will study it correctly and steadily. The inestimable value of psychology cannot be comprehended by a mere reading or superficial knowledge, - its true worth can only be ascertained by study, concentration and practice, and in all fairness to the writer and yourself, you are requested to follow the methods set forth herein faithfully. If you will do this, you will find that psychology will do for you what it has done for others, that it will actually produce the mental, physical, and material results for which you have so long been seeking.