The best known productions of phantasy are the so-called "day dreams," which we already know, pictured satisfactions of ambitious, of covetous and erotic wishes, which flourish the more grandly the more reality admonishes them to modesty and patience. There is unmistakably shown in them the nature of imaginative happiness, the restoration of the independence of pleasurable gratification from the acquiescence of reality. We know such day dreams are nuclei and models for the dreams of night. The night dream is essentially nothing but a day dream, distorted by the nocturnal forms of psychological activity, and made available by the freedom which the night gives to instinctive impulses. We have already become acquainted with the idea that a day dream is not necessarily conscious, that there are also unconscious day dreams. Such unconscious day dreams are as much the source of night dreams as of neurotic symptoms. The significance of phantasy for the development of symptoms will become clear to you by the following: We have said that in a case of renunciation, the libido occupies regressively the positions once abandoned by it, to which, nevertheless, it has clung in certain ways. We shall neither retract this statement nor correct it, but we shall insert a missing link. How does the libido find its way to these points of fixation? Well, every object and tendency of the libido that has been abandoned, is not abandoned in every sense of the word. They, or their derivatives, are still held in presentations of the phantasy, with a certain degree of intensity. The libido need only retire to the imagination in order to find from them the open road to all suppressed fixations. These phantasies were happy under a sort of tolerance, there was no conflict between them and the ego, no matter how acute the contrast, so long as a certain condition was observed--a condition _quantitative_ in nature that is now disturbed by the flowing back of the libido to the phantasies. By this addition the accumulation of energy in the phantasies is heightened to such a degree that they become assertive and develop a pressure in the direction of realization. But that makes a conflict between them and the ego inevitable. Whether formerly conscious or unconscious, they now are subject to suppression by the ego and are victims to the attraction of the unconscious. The libido wanders from phantasies now unconscious to their sources in unconsciousness, and back to its own points of fixation.