[Language and psychiatry].

Language is intimately linked with knowledge. In psychiatry it is initially focused upon the patient and proves to be a natural language. When the studies are extended to the social environment, the use of statistics and more general properties orientates it towards logico-mathematical abstractions. Finally in order to respect the singular and universal aspect of the mentally sick person, the logical operations are integrated within the discourse. It is the case especially for the systemal method, for interdisciplinary studies and retroactive study of the observer's own ways of thinking. In this way it is eventually possible to extract organic laws. In conclusion psychiatric language proves to be an instrument of communication for the person, within himself and with the outer world, taking the shape of a wider and wider spiral, better and better expressing phenomena with singular et universal meanings.