Levy writes of the tendency to forget about the patient's capacity and its limitations because of our bias in favor of the psychodynamic approach. By capacity is meant the individual's ability, fitness, endowment in a general sense, and the nonmotivational aspects of his behavior. Organic defects and physical immaturity provide obvious examples. Levy also includes psychological mechanisms that are rigid structures. Such a mechanism is best regarded as an incapacity beyond the influence of motivational psychotherapy. Capacity is also limited by the results of severe emotional deprivation, by variations in capacity for mothering, and by severe negativism.