Psychiatrist R. C. Murphy writes "Self knowledge, in Mr. Peale's understanding is unequivocally bad: self hypnosis is good." Murphy adds that repeated hypnosis defeats an individual's self-motivation, self-knowledge, unique sense of self, sense of reality, and ability to think critically. Murphy describes Peale's understanding of the mind as inaccurate, "without depth", and his description of the workings of the mind and the unconscious as deceptively simplistic and false: "It is the very shallowness of his concept of 'person' that makes his rules appear easy ... If the unconscious of man ... can be conceptualized as a container for a small number of psychic fragments, then ideas like 'mind-drainage' follow. So does the reliance on self-hypnosis, which is the cornerstone of Mr. Peale's philosophy.'"