If somatic sources of excitement occurring during sleep—that is, the sensations of sleep—are not of unusual intensity, they play a part in the formation of dreams similar, in my judgment, to that of the impressions of the day which have remained recent but indifferent. I mean that they are drawn into the dream formation, if they are qualified for being united with the presentation content of the psychic dream-source, but in no other case. They are treated as a cheap ever-ready material, which is utilised as often as it is needed, instead of prescribing, as a precious material does, the manner in which it is to be utilised. The case is similar to that where a patron of art brings to an artist a rare stone, a fragment of onyx, in order that a work of art may be made of it. The size of the stone, its colour, and its marking help to decide what bust or what scene shall be represented in it, while in the case where there is a uniform and abundant supply of marble or sandstone the artist follows only the idea which takes shape in his mind. Only in this manner, it seems to me, is the fact explicable that the dream content resulting from bodily excitements that have not been accentuated to a usual degree, does not appear in all dreams and during every night.
Perhaps an example, which takes us back to the interpretation of dreams, will best illustrate my meaning. One day I was trying to understand the meaning of the sensations of being impeded, of not being able to move from the spot, of not being able to get finished, &c., which are dreamt about so often, and which are so closely allied to anxiety. That night I had the following dream: I am very incompletely dressed, and I go from a dwelling on the ground floor up a flight of stairs to an upper story. In doing this I jump over three steps at a time, and I am glad to find I can mount the steps so quickly. Suddenly I see that a servant girl is coming down the stairs, that is, towards me. I am ashamed and try to hurry away, and now there appears that sensation of being impeded; I am glued to the steps and cannot move from the spot.
Analysis: The situation of the dream is taken from everyday reality. In a house in Vienna I have two apartments, which are connected only by a flight of stairs outside. My consultation-rooms and my study are on an elevated portion of the ground floor, and one story higher are my living-rooms.
