Further, our parallels to dream-symbolism may assist you to appreciate what it is in psycho-analysis which makes it a subject of general interest, in a way that was not possible to either psychology or psychiatry; psycho-analytic work is so closely intertwined with so many other branches of science, the investigation of which gives promise of the most valuable conclusions: with mythology, philology, folk-lore, folk psychology and the study of religion. You will not be surprised to hear that a publication has sprung from psycho-analytic soil, of which the exclusive object is to foster these relations. I refer to _Imago_, first published in 1912 and edited by Hanns Sachs and Otto Rank. In its relation to all these other subjects, psycho-analysis has in the first instance given rather than received. True, analysis reaps the advantage of receiving confirmation of its own results, seemingly so strange, again in other fields; but on the whole it is psycho-analysis which supplies the technical methods and the points of view, the application of which is to prove fruitful in these other provinces. The mental life of the human individual yields, under psycho-analytic investigation, explanations which solve many a riddle in the life of the masses of mankind or at any rate can show these problems in their true light. I have still given you no idea of the circumstances in which we may arrive at the deepest insight into that hypothetical “primordial language,” or of the province in which it is for the most part retained. As long as you do not know this you cannot appreciate the true significance of the whole subject. I refer to the province of neurosis; the material is found in the symptoms and other modes of expression of nervous patients, for the explanation and treatment of which psycho-analysis was indeed devised. My fourth point of view takes us back to the place from which we started and leads into the track we have already marked out. We said that even if there were no dream-censorship we should still find it difficult to interpret dreams, for we should then be confronted with the task of translating the symbolic language of dreams into the language of waking life. SYMBOLISM, then, is a second and independent factor in dream-distortion, existing side by side with the censorship. But the conclusion is obvious that it suits the censorship to make use of symbolism, in that both serve the same purpose: that of making the dream strange and incomprehensible. Whether a further study of the dream will not introduce us to yet another contributing factor in the distortion, we shall soon see. But I must not leave the subject of dream-symbolism without once more touching on the puzzling fact that it has succeeded in rousing such strenuous opposition amongst educated persons, although the prevalence of symbolism in myth, religion, art and language is beyond all doubt. Is it not probable that, here again, the reason is to be found in its relation to sexuality?