It is with great pleasure that I accede to the kind request of Dr. Frankwood Williams to say something about the possible relations between the mental-hygiene movement and the psychological and therapeutical method originated and developed by Freud and called psycho-analysis. For a long time I have been convinced that the importance of those relations has, generally speaking, been too little appreciated. The literature of psychoanalysis has been concerned chiefly with the investigation of neuroses, from which it obtained all its new knowledge. Although this knowledge has at times been applied to the psychoses also, the analysis of the psychoses has remained only applied psychoanalysis, as it were; it has not developed into an independent source of knowledge.