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IV. TOPOGRAPHY AND DYNAMICS OF REPRESSION
We have arrived at the conclusion that repression is essentially a process
affecting ideas on the border between the systems Ucs. and Pcs. (Cs.), and we can now make a fresh attempt to describe the process in greater
detail.
It must be a matter of a withdrawal of cathexis; but the question is, in which system does the withdrawal take
place and to which system does the cathexis that is withdrawn belong? The
repressed idea remains capable of action in the Ucs., and it must therefore have retained its cathexis. What has been withdrawn
must be something else. Let us take the case of repression proper (
after-pressure’), as it affects an idea which is preconscious or even actually conscious.
Here repression can only consist in withdrawing from the idea the (preconscious
cathexis which belongs to the system Pcs. The idea then either remains uncathected, or receives cathexis from the Ucs., or retains the Ucs. cathexis which it already had. Thus there is a withdrawal of the preconscious
cathexis, retention of the unconscious cathexis, or replacement of the
preconscious cathexis by an unconscious one. We notice, moreover, that we have based
these reflections (as it were, without meaning to) on the assumption that the
transition from the system Ucs. to the system next to it is not effected through the making of a new
registration but through a change in its state, an alteration in its cathexis. The
functional hypothesis has here easily defeated the topographical one.
But this process of withdrawal of libido is not adequate to make another
characteristic of repression comprehensible to us. It is not clear why the idea
which has remained cathected or has received cathexis from the Ucs. should not, in virtue of its cathexis, renew the attempt to penetrate into
the system Pcs. If it could do so, the withdrawal of libido from it would have to be
repeated, and the same performance would go on endlessly; but the outcome would not be
repression. So, too, when it comes to describing primal repression, the mechanism just discussed of withdrawal of preconscious
cathexis would fail to meet the case; for here we are dealing with an unconscious
idea which has as yet received no cathexis from the Pcs. and therefore cannot have that cathexis withdrawn from it.