First of all, we must orient ourselves in our task, and take a bird’s eye view of our field. What is a dream? It is difficult to say in one sentence. But we do not want to attempt any definition where a reference to the material with which everyone is familiar suffices. Yet we ought to select the essential element of the dream. How can that be found? There are such monstrous differences within the boundary which encloses our province, differences in every direction. The essential thing will very probably be that which we can show to be common to all dreams.
Well, the first thing which is common to all dreams is that we are asleep during their occurrence. The dream is apparently the psychic life during sleep, which has certain resemblances to that of the waking condition, and on the other hand is distinguished from it by important differences. That was noted even in Aristotle’s definition. Perhaps there are other connections obtaining between the dream and sleep. One can be awakened by a dream, one frequently has a dream when he wakes spontaneously or is forcibly awakened from sleep. The dream then seems to be an intermediate condition between sleeping and waking. Thus we are referred to the problem of sleep. What, then, is sleep?
That is a physiological or biological problem concerning which there is still much controversy. We can form no decision on the point, but I think we may attempt a psychological characterization of sleep. Sleep is a condition in which I wish to have nothing to do with the external world, and have withdrawn my interest from it. I put myself to sleep by withdrawing myself from the external world and by holding off its stimuli. I also go to sleep when I am fatigued by the external world. Thus, by going to sleep, I say to the external world, “Leave me in peace, for I wish to sleep.” Conversely, the child says, “I won’t go to bed yet, I am not tired, I want to have some more fun.” The biological intention of sleep thus seems to be recuperation; its psychological character, the suspension of interest in the external world. Our relation to the world into which we came so unwillingly, seems to include the fact that we cannot endure it without interruption. For this reason we revert from time to time to the prenatal existence, that is, to the intra-uterine existence. At least we create for ourselves conditions quite similar to those obtaining at that time — warmth, darkness and the absence of stimuli. Some of us even roll ourselves into tight packages and assume in sleep a posture very similar to the intra-uterine posture. It seems as if the world did not wholly possess us adults, it has only two-thirds of our life, we are still one-third unborn. Each awakening in the morning is then like a new birth. We also speak of the condition after sleep with the words, “I feel as though I had been born anew,” by which we probably form a very erroneous idea of the general feeling of the newly born. It may be assumed that the latter, on the contrary, feel very uncomfortable. We also speak of birth as “seeing the light of day.” If that be sleep, then the dream is not on its program at all, rather it seems an unwelcome addition. We think, too, that dreamless sleep is the best and only normal sleep. There should be no psychic activity in sleep; if the psyche stirs, then just to that extent have we failed to reduplicate the foetal condition; remainders of psychic activity could not be completely avoided. These remainders are the dream. Then it really does seem that the dream need have no meaning. It was different in the case of errors; they were activities of the waking state. But when I am asleep, have quite suspended psychic activity and have suppressed all but certain of its remainders, then it is by no means inevitable that these remainders have a meaning. In fact, I cannot make use of this meaning, in view of the fact that the rest of my psyche is asleep. This must, of course, be a question only of twitching, like spasmodic reactions, a question only of psychic phenomena such as follow directly upon somatic stimulation. The dream, therefore, appears to be the sleep-disturbing remnant of the psychic activity of waking life, and we may make the resolution promptly to abandon a theme which is so ill-adapted to psychoanalysis.
However, even if the dream is superfluous, it exists nevertheless and we may try to give an account of its existence. Why does not the psyche go to sleep? Probably because there is something which gives it no rest. Stimuli act upon the psyche, and it must react to them. The dream, therefore, is the way in which the psyche reacts to the stimuli acting upon it in the sleeping condition. We note here a point of approach to the understanding of the dream. We can now search through different dreams to discover what are the stimuli which seek to disturb the sleep and which are reacted to with dreams. Thus far we might be said to have discovered the first common element.
Are there other common elements? Yes, it is undeniable that there are, but they are much more difficult to grasp and describe. The psychic processes of sleep, for example, have a very different character from those of waking. One experiences many things in the dream, and believes in them, while one really has experienced nothing but perhaps the one disturbing stimulus. One experiences them predominantly in visual images; feelings may also be interspersed in the dream as well as thoughts; the other senses may also have experiences, but after all the dream experiences are predominantly pictures. A part of the difficulty of dream telling comes from the fact that we have to transpose these pictures into words. “I could draw it,” the dreamer says frequently, “but I don’t know how to say it.” That is not really a case of diminished psychic activity, like that of the feeble-minded in comparison with the highly gifted; it is something qualitatively different, but it is difficult to say wherein the difference lies. G. T. Fechner once hazarded the conjecture that the scene in which dreams are played is a different one from that of the waking perceptual life. To be sure, we do not understand this, do not know what we are to think of it, but the impression of strangeness which most dreams make upon us does really bear this out. The comparison of the dream activity with the effects of a hand untrained in music also fails at this point. The piano, at least, will surely answer with the same tones, even if not with melodies, as soon as by accident one brushes its keys. Let us keep this second common element of all dreams carefully in mind, even though it be not understood.
Are there still further traits in common? I find none, and see only differences everywhere, differences indeed in the apparent length as well as the definiteness of the activities, participation of effects, durability, etc. All this really is not what we might expect of a compulsion-driven, irresistible, convulsive defense against a stimulus. As concerns the dimensions of dreams, there are very short ones which contain only one picture or a few, one thought — yes, even one word only — others which are uncommonly rich in content, seem to dramatize whole novels and to last very long. There are dreams which are as plain as an experience itself, so plain that we do not recognize them as dreams for a long time after waking; others which are indescribably weak, shadowy and vague; indeed in one and the same dream, the overemphasized and the scarcely comprehensible, indefinite parts may alternate with each other. Dreams may be quite meaningful or at least coherent, yes, even witty, fantastically beautiful. Others, again, are confused, as if feeble-minded, absurd, often actually mad. There are dreams which leave us quite cold, others in which all the effects come to expression — pain deep enough for tears, fear strong enough to waken us, astonishment, delight, etc. Dreams are generally quickly forgotten upon waking, or they may hold over a day to such an extent as to be faintly and incompletely remembered in the evening. Others, for example, the dreams of childhood, are so well preserved that they stay in the memory thirty years later, like fresh experiences. Dreams, like individuals, may appear a single time, and never again, or they may repeat themselves unchanged in the same person, or with small variations. In short, this nightly psychic activity can avail itself of an enormous repertoire, can indeed compass everything which the psychic accomplishes by day, but yet the two are not the same.
One might try to give an account of this many-sidedness