At the beginning of the 19th century France had many experts on the ‘moral treatment of insanity’. Very few of them, however, applied their experience and theories to the role of language in the development of behaviour from childhood on, in the pathogenesis of mental disorders, and in psychotherapy. To Dr. Louis Cerise, one of the founders of the Annales Médico-Psychologiques, belongs the great distinction of formulating a theory which tried to take account of the necessary contribution of language to individual development. In his book Des Fonctions et des Maladies Nerveuses (1842), he put forward a view of the relationship between the individual and society. His concept of ‘the goal of activity’ still merits our attention.