The ethical obligation of psychiatrist includes acting in the best interest of the patient, doing no harm, and observing justice, i.e. acting with regard to the limited resources of the community. Psychiatrist can perform this best if it is sensitive on the one hand to the consequences of the determination that an illness value is a disorder, if it is consider not only the medical but also the psychic and social consequences of a diagnosis, and, on the other hand, if the diagnostic competence not only to apply the standardised diagnostic algorithms for assessing the illness of the patient but also for the patient's personal experience of ill being. Furthermore, the moral valuation of our language (and of our scientific instruments expressed in language) should be recognized and its influence should be reflected in the diagnostic assessment of a disorder; it should be considered particularly in assessing the individuality of the patient as a sick person and should be used in dealing with him and optimizing treatment.