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Later on we shall learn to recognize the momentous nature of this hypothesis
regarding the unruliness of repressed impulses. For the present let us follow
out the situation which occurs in dream-formation.
The possibility mentioned above - that some of the preconscious thoughts of
the day may also prove resistant and retain a part of their cathexis - must be
recognized as a second breach in narcissism. At bottom, the two cases may be
identical. The resistance of the day’s residues may originate in a link with
unconscious impulses which is already in existence during waking life; or the
process may be somewhat less simple, and the day’s residues which have not been
wholly emptied of cathexis may establish a connection with the repressed material
only after the state of sleep has set in, thanks to the easing of communication
between the Pcs. and the Ucs. In both cases there follows the same decisive step in dream-formation: the
preconscious dream-wish is formed, which gives expression to the unconscious impulse in the material of the
preconscious day’s residues. This dream-wish must be sharply distinguished from the day’s residues; it
need not have existed in waking life and it may already display the irrational
character possessed by everything that is unconscious when we translate it into
the conscious. Again, the dream-wish must not be confused with the wishful
impulses which may have been present, though they certainly need not necessarily be
present, amongst the preconscious (latent) dream-thoughts. If, however, there were any such preconscious wishes, the dream-wish associates itself with them, as
a most effective reinforcement of them.