[Illness concept responsible for illness].

With a certain heuristic exaggeration, the author dares to demand from psychologists a biographic phenomenological diagnosis without prejudicial influence by the medical diagnosis. Needless to say, the psychologist has to deal with " sick" people quite often. His task as a diagnostician however is not to find a category which would discriminate the patient but to describe him in his biographic and social perspective. The psychological diagnostician should not forget that psychic illnesses imply isolation and that medical diagnosis in this case makes isolation even more apparent. In any case, the psychologist and especially the psychoanalyst must be self-critical and avoid prejudice in diagnostics.