unsolved; 3, that which has been rejected and suppressed during the day.
This unites with a powerful group (4) formed by that which has been
excited in our Unc. during the day by the work of the foreconscious.
Finally, we may add group (5) consisting of the indifferent and hence
unsettled impressions of the day.

We should not underrate the psychic intensities introduced into sleep by
these remnants of waking life, especially those emanating from the group
of the unsolved. These excitations surely continue to strive for
expression during the night, and we may assume with equal certainty that
the sleeping state renders impossible the usual continuation of the
excitement in the foreconscious and the termination of the excitement by
its becoming conscious. As far as we can normally become conscious of
our mental processes, even during the night, in so far we are not
asleep. I shall not venture to state what change is produced in the
Forec. system by the sleeping state, but there is no doubt that the
psychological character of sleep is essentially due to the change of
energy in this very system, which also dominates the approach to
motility, which is paralyzed during sleep. In contradistinction to this,
there seems to be nothing in the psychology of the dream to warrant the
assumption that sleep produces any but secondary changes in the
conditions of the Unc. system. Hence, for the nocturnal excitation in
the Force, there remains no other path than that followed by the wish
excitements from the Unc. This excitation must seek reinforcement from
the Unc., and follow the detours of the unconscious excitations. But
what is the relation of the foreconscious day remnants to the dream?
There is no doubt that they penetrate abundantly into the dream, that
they utilize the dream content to obtrude themselves upon consciousness
even during the night; indeed, they occasionally even dominate the dream
content, and impel it to continue the work of the day; it is also