The phantasies of adults are, in so far as they are conscious, of great diversity and strongly individual. It is therefore nearly impossible to give a general description of them. But it is very different when we enter by means of analysis into the world of his unconscious phantasies. The diversities of the phantasies are indeed very great, but we do not find those individual peculiarities which we find in the conscious self. We meet here with more typical material which is not infrequently repeated in a similar form in different people. Constantly recurring, for instance, are ideas which are variations of the thoughts we encounter in religion and mythology. This fact is so convincing that we say we have discovered in these phantasies the same mechanisms which once created mythological and religious ideas. I should have to enter very much into detail in order to give you adequate examples. I must refer you for these problems to my work, “Wandlungen und Symbole der Libido.” I will only mention that, for instance, the central symbol of Christianity—self-sacrifice—plays an important part in the phantasies of the unconscious. The Viennese School describes this phenomenon by the ambiguous term castration-complex. This paradoxical use of the term follows from the particular attitude of this school toward the question of unconscious sexuality. I have given special attention to the problem in the book I have just mentioned; I must here restrict myself to this incidental reference and hasten to say something about the origin of the unconscious phantasy.