work necessarily results from the inhibition of these primary courses
from the fact that we gain a _comical effect_, a surplus to be
discharged through laughter, _if we allow these streams of thought to
come to consciousness_.

The theory of the psychoneuroses asserts with complete certainty that
only sexual wish-feelings from the infantile life experience repression
(emotional transformation) during the developmental period of childhood.
These are capable of returning to activity at a later period of
development, and then have the faculty of being revived, either as a
consequence of the sexual constitution, which is really formed from the
original bisexuality, or in consequence of unfavorable influences of the
sexual life; and they thus supply the motive power for all
psychoneurotic symptom formations. It is only by the introduction of
these sexual forces that the gaps still demonstrable in the theory of
repression can be filled. I will leave it undecided whether the
postulate of the sexual and infantile may also be asserted for the
theory of the dream; I leave this here unfinished because I have already
passed a step beyond the demonstrable in assuming that the dream-wish
invariably originates from the unconscious.[2] Nor will I further
investigate the difference in the play of the psychic forces in the
dream formation and in the formation of the hysterical symptoms, for to
do this we ought to possess a more explicit knowledge of one of the
members to be compared. But I regard another point as important, and
will here confess that it was on account of this very point that I have
just undertaken this entire discussion concerning the two psychic
systems, their modes of operation, and the repression. For it is now
immaterial whether I have conceived the psychological relations in
question with approximate correctness, or, as is easily possible in such
a difficult matter, in an erroneous and fragmentary manner. Whatever