Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Psycho-analysis has plunged us into the midst of a dynamic theory of the mind, it has given to the study of mental processes a concrete turn, it has led us to concentrate on child psychology and the history of the individual. Last but not least, it has forced upon us the consideration of the unofficial and unacknowledged Sides of human life.
