results disclosed by analysis? The answer is, because every dream which I investigate leads to the same difficulties and places me under the same need of discretion; nor should I forgo this difficulty any the more were I to analyze the dream of some one else. That could only be done when opportunity allowed all concealment to be dropped without injury to those who trusted me. The conclusion which is now forced upon me is that the dream is a _sort of substitution_ for those emotional and intellectual trains of thought which I attained after complete analysis. I do not yet know the process by which the dream arose from those thoughts, but I perceive that it is wrong to regard the dream as psychically unimportant, a purely physical process which has arisen from the activity of isolated cortical elements awakened out of sleep. I must further remark that the dream is far shorter than the thoughts which I hold it replaces; whilst analysis discovered that the dream was provoked by an unimportant occurrence the evening before the dream. Naturally, I would not draw such far-reaching conclusions if only one analysis were known to me. Experience has shown me that when the associations of any dream are honestly followed such a chain of thought is revealed, the constituent parts of the dream reappear correctly and sensibly linked together; the slight suspicion that this concatenation was merely an accident of a single first observation must, therefore, be absolutely relinquished. I regard it, therefore, as my right to establish this new view by a proper nomenclature. I contrast the dream which my memory evokes with the dream and other added matter revealed by analysis: the former I call the dream's _manifest content_; the latter, without at first further subdivision, its _latent content_. I arrive at two new problems hitherto unformulated: (1) What is the psychical process which has transformed the latent content of the dream into its manifest content? (2) What is the motive or the motives which have made such transformation exigent? The process by which the change from latent to manifest content is executed I name the _dream-work_. In contrast with this is the _work of analysis_, which produces the reverse transformation. The other problems of the dream--the inquiry as to its stimuli, as to the source of its materials, as to its possible purpose, the function of dreaming, the forgetting of dreams--these I will discuss in connection with the latent dream-content. I shall take every care to avoid a confusion between the _manifest_ and the _latent content_, for I ascribe all the contradictory as well as the incorrect accounts of dream-life to the ignorance of this latent content, now first laid bare through analysis.