probably this modification of the usual psychic process which makes possible the cathexis * of the system of P to its full sensory vividness in the reverse direction to thinking. -

* From the Greek Kathexo, to occupy, used here in place of the author's term Besetzung, to signify a charge or investment of energy.- TR.

I hope that we are not deluding ourselves as regards the importance of this present discussion. We have done nothing more than give a name to an inexplicable phenomenon. We call it regression if the idea in the dream is changed back into the visual image from which it once originated. But even this step requires justification. Why this definition if it does not teach us anything new? Well, I believe that the word regression is of service to us, inasmuch as it connects a fact familiar to us with the scheme of the psychic apparatus endowed with direction. At this point, and for the first time, we shall profit by the fact that we have constructed such a scheme. For with the help of this scheme we shall perceive, without further reflection, another peculiarity of dream-formation. If we look upon the dream as a process of regression within the hypothetical psychic apparatus, we have at once an explanation of the empirically proven fact that all thought-relations of the dream-thoughts are either lost in the dream-work or have difficulty in achieving expression. According to our scheme, these thought-relations are contained not in the first mem-systems, but in those lying farther to the front, and in the regression to the perceptual images they must forfeit expression. In regression, the structure of the dream- thoughts breaks up into its raw material.

But what change renders possible this regression which is impossible during the day? Let us here be content with an assumption. There must evidently be changes in the cathexis of the individual systems, causing the latter to become more accessible or inaccessible to the discharge of the excitation; but in any such apparatus the same effect upon the course of the excitation might be produced by more than one kind of change. We naturally think of the. sleeping state, and of the many cathectic changes which this evokes at the sensory end of the apparatus. During the day there is a continuous stream flowing from the Psi- system of the P toward the motility end; this current ceases at night, and can no longer block the flow of the current of excitation in the opposite direction. This would appear to be that seclusion from the outer world which, according to the theory of some writers, is supposed to explain the psychological character of the dream. In the explanation of the regression of the dream we shall, however, have to take into account those other regressions which occur during morbid waking states. In these other forms of regression the explanation just given plainly leaves us in the lurch. Regression occurs in spite of the uninterrupted sensory current in a progressive direction.

The hallucinations of hysteria and paranoia, as well as the visions of mentally normal persons, I would explain as corresponding, in fact, to regressions, i.e., to thoughts transformed into images; and would assert that only such thoughts undergo this transformation as are in intimate connection with suppressed memories, or with memories which have remained unconscious. As an example, I will cite the case of one of my youngest hysterical patients- a boy of twelve, who was prevented from falling asleep by "green faces with red eyes," which terrified him. The source of this manifestation was the suppressed, but once conscious memory of a boy whom he had often seen four years earlier, and who offered a warning example of many bad habits, including masturbation, for which he was now reproaching himself. At that time his mother had noticed that the complexion of this ill-mannered boy was greenish and that he had red (i.e., red-rimmed) eyes. Hence his terrifying vision, which merely determined his recollection of another saying of his mother's, to the effect that such boys become demented, are unable to learn anything at school, and are doomed to an early death. A part of this prediction came true in the case of my little patient; he could not get on at school, and, as appeared from his involuntary associations, he was in terrible dread of the remainder of the prophecy. However, after a brief period of successful treatment his sleep was restored, his anxiety removed, and he finished his scholastic year with an excellent record.

Here I may add the interpretation of a vision described to me by an hysterical woman of forty, as having occurred when she was in normal health. One morning she opened her eyes and saw her brother in