At the same time, while I assigned to sexuality this significance in the origin of the simple neurosis, I still professed for the psychoneuroses (hysteria and obsessions) a purely psychological theory in which the sexual moment was no differently considered than any other emotional sources. Together with J. Breuer, and in addition to observations which he has made on his hysterical patients fully a decade before, I have studied the mechanism of the origin of hysterical symptoms by the awakening of memories in hypnotic states. We obtained information which permitted us to cross the bridge from Charcot’s traumatic hysteria to the common non-traumatic hysteria. We reached the conception that the hysterical symptoms are permanent results of psychic traumas, and that the amount of affect belonging to them was pushed away from conscious elaboration by special determinations, thus forcing an abnormal road into bodily innervation. The terms “strangulated affect,” “conversion,” and “ab-reaction,” comprise the distinctive characteristics of this conception. In the close relations of the psychoneuroses to the simple neuroses, which can go so far that the diagnostic distinction is not always easy for the unpracticed, it could happen that the cognition gained from one sphere has also taken effect in the other. Leaving such influences out of the question, the deep study of the psychic traumas also leads to the same results. If by the “analytic” method we continue to trace the psychic traumas from which the hysterical symptoms are derived, we finally reach to experiences which belong to the patient’s childhood, and concern his sexual life. This can be found even in such cases where a banal emotion of a non-sexual nature has occasioned the outburst of the disease. Without taking into account these sexual traumas of childhood we could neither explain the symptoms, find their determination intelligible, nor guard against their recurrence. The incomparable significance of sexual experiences in the etiology of the psychoneuroses seems therefore firmly established, and this fact remains until today one of the main supports of the theory. If we represent this theory by saying that the course of the life long hysterical neurosis lies in the sexual experiences of early childhood which are usually trivial in themselves, it surely would sound strange enough. But if we take cognizance of the historical development of the theory, and transfer the main content of the same into the sentence: hysteria is the expression of a special behavior of the sexual function of the individual, and that this behavior was already decisively determined by the first effective influences and experiences of childhood, we will perhaps be poorer in a paradox but richer in a motive for directing our attention to a hitherto very neglected and most significant aftereffect of infantile impressions in general.