seems almost as though hysterical patients must vomit for some reason as yet unknown, and that the historic factors, revealed by analysis, are chance pretexts, seized on as opportunity best offered to serve the purposes of a deeper need. Thus we soon reach the discouraging conclusion that although we can satisfactorily explain the individual neurotic symptom by relating it to an experience, our science fails us when it comes to the typical symptoms that occur far more frequently. In addition, remember that I am not going into all the detailed difficulties which come up in the course of resolutely hunting down an historic interpretation of the symptom. I have no intention of doing this, for though I want to keep nothing from you, and so paint everything in its true colors, I still do not wish to confuse and discourage you at the very outset of our studies. It is true that we have only begun to understand the interpretation of symptoms, but we wish to hold fast to the results we have achieved, and struggle forward step by step toward the mastery of the still unintelligible data. I therefore try to cheer you with the thought that a fundamental between the two kinds of symptoms can scarcely be assumed. Since the individual symptoms are so obviously dependent upon the experience of the patient, there is a possibility that the typical symptoms revert to an experience that is in itself typical and common to all humanity. Other regularly recurring features of neurosis, such as the repetition and doubt of the compulsion neurosis, may be universal reactions which are forced upon the patient by the very nature of the abnormal change. In short, we have no reason to be prematurely discouraged; we shall see what our further results will yield. We meet a very similar difficulty in the theory of dreams, which in our previous discussion of the dream I could not go into. The manifest content of dreams is most profuse and individually varied, and I have shown very explicitly what analysis may glean from this content. But side by side with these dreams there are others which may also be termed "typical" and which occur similarly in all people. These are dreams of identical content which offer the same difficulties for their interpretation as the typical symptom. They are the dreams of falling, flying, floating, swimming, of being hemmed in, of nakedness, and various other anxiety dreams that yield first one and then another interpretation for the different patients, without resulting in an explanation of their monotonous and typical recurrence. In the matter of these dreams also, we see a fundamental groundwork enriched by individual additions. Probably they as well can be fitted into the theory of dream life, built up on the basis of other dreams,--not however by straining the point, but by the gradual broadening of our views. EIGHTEENTH LECTURE GENERAL THEORY OF THE NEUROSES _Traumatic Fixation--The Unconscious_