Inferiority feelings, timidity and other personality defects are rooted in, and perpetuated by, the power of imagination. For that reason alone, such problems cannot be countered effectively by will power alone. Will power is a function of the conscious mind, and it is always at the mercy of the subconscious. It is upon this elementary truth that the techniques of hypnotherapy and self-hypnosis are founded, and because of their utilisation and manipulation of the force of imagination upon the subconscious, they are the most effective means of implementing one's will power. Self-hypnosis thereby deserves supreme consideration in any effective programme of self-improvement.