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The Interpretation Of Dreams Sigmund Freud (1900) PREFACE

The Interpretation Of Dreams Sigmund Freud (1900) PREFACE

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with the perceptions. If, now, it can be confirmed that for consciousness memory and quality are mutually exclusive in the Psi-systems, we have<br />

gained a most promising insight into the determinations of the neuron excitations.[16]<br />

What we have so far assumed concerning the composition of the psychic apparatus at the sensible end has been assumed regardless of dreams and<br />

of the psychological explanations which we have hitherto derived from them. <strong>Dreams</strong>, however, will serve as a source of evidence for our<br />

knowledge of another part of the apparatus. We have seen that it was impossible to explain dream-formation unless we ventured to assume two<br />

psychic instances, one of which subjected the activities of the other to criticism, the result of which was exclusion from consciousness.<br />

We have concluded that the criticizing instance maintains closer relations with the consciousness than the instance criticized. It stands between<br />

the latter and the consciousness like a screen. Further, we have found that there is reason to identify the criticizing instance with that which directs<br />

our waking life and determines our voluntary conscious activities. If, in accordance with our assumptions, we now replace these instances by<br />

systems, the criticizing system will therefore be moved to the motor end. We now enter both systems in our diagram, expressing, by the names<br />

given them, their relation to consciousness. (See illustration.)<br />

<strong>The</strong> last of the systems at the motor end we call the preconscious (Pcs.) to denote that the exciting processes in this system can reach<br />

consciousness without any further detention, provided certain other conditions are fulfilled, e.g., the attainment of a definite degree of intensity, a<br />

certain apportionment of that function which we must call attention, etc. This is at the same time the system which holds the keys of voluntary<br />

motility. <strong>The</strong> system behind it we call the unconscious (Ucs), because it has no access to consciousness except through the preconscious, in the<br />

passage through which the excitation-process must submit to certain changes.[17]<br />

In which of these systems, then, do we localize the impetus to dream-formation? For the sake of simplicity, let us say in the system Ucs. We shall<br />

find, it is true, in subsequent discussions, that this is not altogether correct; that dream-formation is obliged to make connection with dreamthoughts<br />

which belong to the system of the preconscious. But we shall learn elsewhere, when we come to deal with the dream-wish, that the<br />

motive-power of the dream is furnished by the Ucs, and on account of this factor we shall assume the unconscious system as the starting-point for<br />

dream-formation. This dream-excitation, like all the other thought-structures, will now strive to continue itself in the Pcs, and thence to gain<br />

admission to the consciousness.<br />

Experience teaches us that the path leading through the preconscious to consciousness is closed to the dream-thoughts during the day by the<br />

resisting censorship. At night they gain admission to consciousness; the question arises: In what way and because of what changes? If this<br />

admission were rendered possible to the dream-thoughts by the weakening, during the night, of the resistance watching on the boundary between<br />

the unconscious and the preconscious, we should then have dreams in the material of our ideas, which would not display the hallucinatory<br />

character that interests us at present.<br />

<strong>The</strong> weakening of the censorship between the two systems, Ucs and Pcs, can explain to us only such dreams as the Autodidasker dream but not<br />

dreams like that of the burning child, which - as will be remembered - we stated as a problem at the outset in our present investigations.<br />

What takes place in the hallucinatory dream we can describe in no other way than by saying that the excitation follows a retrogressive course. It<br />

communicates itself not to the motor end of the apparatus, but to the sensory end, and finally reaches the system of perception. If we call the<br />

direction which the psychic process follows from the unconscious into the waking state progressive, we may then speak of the dream as having a<br />

regressive character.[18]<br />

This regression is therefore assuredly one of the most important psychological peculiarities of the dream-process; but we must not forget that it is<br />

not characteristic of the dream alone. Intentional recollection and other component processes of our normal thinking likewise necessitate a<br />

retrogression in the psychic apparatus from some complex act of ideation to the raw material of the memory-traces which underlie it. But during<br />

the waking state this turning backwards does not reach beyond the memory-images; it is incapable of producing the hallucinatory revival of the<br />

perceptual images. Why is it otherwise in dreams? When we spoke of the condensation-work of the dream we could not avoid the assumption that<br />

by the dream-work the intensities adhering to the ideas are completely transferred from one to another. It is probably this modification of the<br />

usual psychic process which makes possible the cathexis[19] of the system of P to its full sensory vividness in the reverse direction to thinking. -<br />

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<br />

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<br />

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<br />

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<br />

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<br />

reflection, another peculiarity of dream-formation. If we look upon the dream as a process of regression within the hypothetical psychic<br />

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<br />

dream-work or have difficulty in achieving expression. According to our scheme, these thought-relations are contained not in the first memsystems,<br />

but in those lying farther to the front, and in the regression to the perceptual images they must forfeit expression. In regression, the<br />

structure of the dream-thoughts breaks up into its raw material.

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