we should first have to throw more light on the play of emotions between
the foreconscious and the unconscious, to which, indeed, we are urged by
the study of the psychoneuroses, whereas the dream itself offers no
assistance in this respect.

Just one further remark about the day remnants. There is no doubt that
they are the actual disturbers of sleep, and not the dream, which, on
the contrary, strives to guard sleep. But we shall return to this point
later.

We have so far discussed the dream-wish, we have traced it to the sphere
of the Unc., and analyzed its relations to the day remnants, which in
turn may be either wishes, psychic emotions of any other kind, or simply
recent impressions. We have thus made room for any claims that may be
made for the importance of conscious thought activity in dream
formations in all its variations. Relying upon our thought series, it
would not be at all impossible for us to explain even those extreme
cases in which the dream as a continuer of the day work brings to a
happy conclusion and unsolved problem possess an example, the analysis
of which might reveal the infantile or repressed wish source furnishing
such alliance and successful strengthening of the efforts of the
foreconscious activity. But we have not come one step nearer a solution
of the riddle: Why can the unconscious furnish the motive power for the
wish-fulfillment only during sleep? The answer to this question must
throw light on the psychic nature of wishes; and it will be given with
the aid of the diagram of the psychic apparatus.

We do not doubt that even this apparatus attained its present perfection
through a long course of development. Let us attempt to restore it as it
existed in an early phase of its activity. From assumptions, to be