Doubtless, you will raise an objection against our intention to refer to these two regions or stages of the soul with simple pronouns, instead of giving them beautiful euphonious Greek names. However, in psychoanalysis, we prefer to remain in contact with the popular way of thinking, and attach commonplace terms to our scientific conceptions, rather than look upon such nomenclature in contempt. We do not expect to receive credit for this popularization of psychoanalytical terms, inasmuch as we are forced to do this in order to make ourselves plain to our patients who are frequently very intelligent, but not always exactly learned people. The impersonal pronoun “It” is most appropriate for our purposes, as is plainly proved by the fact that we frequently speak of something, averring that “‘It’ came to me quite suddenly”; “‘It’ gave me a shock”; “‘It’ was stronger than I.” “_C’était plus fort que moi._” In the realm of psychology, we can only make ourselves understood by taking recourse to comparisons. This, after all, is no special peculiarity of psychology, inasmuch as other sciences also find it necessary to avail themselves of analogous expedients. These comparisons, however, must be modified time and again, as their application generally proves too limited. If you are seeking an explanation of the relation of the “I” to the “It,” it would be well to remember that the “I” serves as a foreground to the “It.” The “I” is, as it were, the outer, front layer of the “It.” We may so much more readily accept this comparison, inasmuch as layers—say, of a tree—owe their peculiar characteristics to the modifying influence of that exterior medium with which they are in contact. Thus, we visualize that the “I,” being the outer layer of the psychical apparatus, is the “It,” modified in accordance with the influence which the outer world exerts upon it. Here you will perceive how conceptions of space apply to psychoanalysis. To all intents and purposes, the “I” is actually the front layer, the obvious, whereas the “It” is the inner layer, the hidden. To make it even more plain: The “I” is inserted between the reality of the outer world and the “It,” the latter constituting the soul proper, the essence of the soul, as it were. “I am not going to inquire how you came to know all this. I should first like to know how this differentiation between the ‘I’ and the ‘It’ assists you in your psychoanalytical work, and why you need it.” Your question clearly shows me how to proceed. It is most important and extremely valuable to know that the “I” and the “It,” in many instances, greatly differ from each other. As far as the “I” is concerned, psychical activations are subject to a different rule than the one applying to the “It.” The “I” has different intentions from the “It,” availing itself of means other than those resorted to by the “It.”