Your self image and how you think of yourself is the determinant of your success, behavior and outcome in life. It is the blueprint upon which you will behave. All your actions feelings, behavior, and abilities will be consistent with this self image. You will act like the sort of person you conceive yourself to be. Maxwell Matz in his book Psychocybernetics, even goes as far as to mention that you literally cannot behave contrary to your self image, in spite of your conscious efforts or power.