Dream and Culture. – The function of the brain which is most influenced by sleep is the memory; not that it entirely ceases; but it is brought back to a condition of imperfection, such as everyone may have experienced in pre-historic times, whether asleep or awake. Arbitrary and confused as it is, it constantly confounds things on the ground of the most fleeting resemblances; but with the same arbitrariness and confusion the ancients invented their mythologies, and even at the present day travellers are accustomed to remark how prone the savage is to forgetfulness, how, after a short tension of memory, his mind begins to sway here and there from sheer weariness and gives forth lies and nonsense. But in dreams we all resemble the savage; bad recognition and erroneous comparisons are the reasons of the bad conclusions, of which we are guilty in dreams: so that, when we clearly recollect what we have dreamt, we are alarmed at ourselves at harbouring so much foolishness within us. The perfect distinctness of all dream-representations, which pre-suppose absolute faith in their reality, recall the conditions that appertain, to primitive man, in whom hallucination was extraordinarily frequent, and sometimes simultaneously seized entire communities, entire nations. Therefore, in sleep and in dreams we once more carry out the task of early humanity.
The Logic of Dreams. – In sleep our nervous system is perpetually excited by numerous inner occurrences; nearly all the organs are disjointed and in a state of activity, the blood runs its turbulent course, the position of the sleeper causes pressure on certain limbs, his coverings influence his sensations in various ways, the stomach digests and by its movements it disturbs other organs, the intestines writhe, the position of the head occasions unaccustomed play of muscles, the feet, unshod, not pressing upon the floor with the soles, occasion the feeling of the unaccustomed just as does the different clothing of the whole body: all this, according to its daily change and extent, excites by its extraordinariness the entire system to the very functions of the brain, and thus there are a hundred occasions for the spirit to be surprised and to seek for the reasons of this excitation; – the dream, however, is the seeking and representing of the causes of those excited sensations, – that is, of the supposed causes. A person who, for instance, binds his feet with two straps will perhaps dream that two serpents are coiling round his feet; this is first hypothesis, then a belief, with an accompanying mental picture and interpretation – " These serpents must be the causa of those sensations which I, the sleeper, experience," – so decides the mind of the sleeper. The immediate past, so disclosed, becomes to him the present through his excited imagination. Thus every one knows from experience how quickly the dreamer weaves into his dream a loud sound that he hears, such as the ringing of bells or the firing of cannon, that is to say, explains it from afterwards so that he first thinks he experiences the producing circumstances and then that sound. But how does it happen that the mind of the dreamer is always so mistaken, while the same mind when awake is accustomed to be so temperate, careful, and sceptical with regard to its hypotheses? so that the first random hypothesis for the explanation of a feeling suffices for him to believe immediately in its truth? (For in dreaming we believe in the dream as if it were a reality, i. e. we think our hypothesis completely proved.) I hold, that as man now still reasons in dreams, so men reasoned also when awake through thousands of years; the first causa which occurred to the mind to explain anything that required an explanation, was sufficient and stood for truth. (Thus, according to travellers' tales, savages still do to this very day.) This ancient element in human nature still manifests itself in our dreams, for it is the foundation upon which the higher reason has developed and still develops in every individual; the dream carries us back into remote conditions of human culture, and provides a ready means of understanding them better. Dream-thinking is now so easy to us because during immense periods of human development we have been so well drilled in this form of fantastic and cheap explanation, by means of the first agreeable notions. In so far, dreaming is a recreation for the brain, which by day has to satisfy the stern demands of thought, as they are laid down by the higher culture. We can at once discern an allied process even in our awakened state, as the door and ante-room of the dream. If we shut our eyes, the brain produces a number of impressions of light and colour, probably as a kind of after-play and echo of all those effects of light which crowd in upon it by day. Now, however, the understanding, together with the imagination, instantly works up this play of colour, shapeless in itself, into definite figures, forms, landscapes, and animated groups. The actual accompanying process thereby is again a kind of conclusion from the effect to the cause: since the mind asks, "Whence come these impressions of light and colour?" it supposes those figures and forms as causes; it takes them for the origin of those colours and lights, because in the daytime, with open eyes, it is accustomed to find a producing cause for every colour, every effect of light. Here, therefore, the imagination constantly places pictures before the mind, since it supports itself on the visual impressions of the day in their production, and the dream-imagination does just the same thing, – that is, the supposed cause is deduced from the effect and represented after the effect; all this happens with extraordinary rapidity, so that here, as with the conjuror, a confusion of judgment may arise and a sequence may look like something simultaneous, or even like a reversed sequence. From these circumstances we may gather how lately the more acute logical thinking, the strict discrimination of cause and effect has been developed, when our reasoning and understanding faculties still involuntarily hark back to those primitive forms of deduction, and when we pass about half our life in this condition. The poet, too, and the artist assign causes for their moods and conditions which are by no means the true ones; in this they recall an older humanity and can assist us to the understanding of it.
Co-echoing. – All stronger moods bring with them a co-echoing of kindred sensations and moods, they grub up the memory, so to speak. Along with them something within us remembers and becomes conscious of similar conditions and their origin. Thus there are formed quick habitual connections of feelings and thoughts, which eventually, when they follow each other with lightning speed, are no longer felt as complexes but as unities. In this sense one speaks of the moral feeling, of the religious feeling, as if they were absolute unities: in reality they are streams with a hundred sources and tributaries. Here also, as so often happens, the unity of the word is no security for the unity of the thing.
No Internal and External in the World. – As Democritus transferred the concepts "above" and "below" to endless space where they have no sense, so philosophers in general have transferred the concepts "Internal" and "External" to the essence and appearance of the world; they think that with deep feelings one can penetrate deeply into the internal and approach the heart of Nature. But these feelings are only deep in so far as along with them, barely noticeable, certain complicated groups of thoughts, which we call deep, are regularly excited; a feeling is deep because we think that the accompanying thought is deep. But the "deep" thought can nevertheless be very far from the truth, as, for instance, every metaphysical one; if one take away from the deep feeling the commingled elements of thought, then the strong feeling remains, and this guarantees nothing for knowledge but itself, just as strong faith proves only its strength and not the truth of what is believed in.
Phenomenon and Thing-in-itself. – Philosophers are in the habit of setting themselves before life and experience – before that which they call the world of appearance – as before a picture that is once for all unrolled and exhibits unchangeably fixed the same process, – this process, they think, must be rightly interpreted in order to come to a conclusion about the being that produced the picture: about the thing-in-itself, therefore, which is always accustomed to be regarded as sufficient ground for the world of phenomenon. On the other hand, since one always makes the idea of the metaphysical stand definitely as that of the unconditioned, consequently also unconditioning, one must directly disown all connection between the unconditioned (the metaphysical world) and the world which is known to us; so that the thing-in-itself should most certainly