Therapy entails the conceptual machinery to ensure that actual or potential deviants stay within the institutionalized definitions of reality, or, in other words, to prevent "inhabitants" of a given universe from "emigrating". It does this by applying the legitimating apparatus to individual "cases". Since ever society faces the danger of individual deviance, we may assume that therapy in one form or another is a global social phenomena. Its specific institutional arrangements, from exorcism to psycho-analysis, from pastoral care to personal counseling programmes, belong, of course, under the category of social control. [...] Since therapy must concern itself with deviations from the "official" definition of reality, it must develop a machinery to account for such deviations and to maintain the realities thus challenged. This requires a body of knowledge that include a theory of deviance, a diagnostic apparatus, and a conceptual system for the "cure of souls".