believe--if it did not exist. Whether there is such a repression there or
not I do not know, but I see no necessity for considering that there is one
there just because there is a dim place in the dream. In the study which I
made of dreams a year or so ago, I became convinced that there is a
principle of dream-making which has not been noticed. I will throw out a
suggestion here in the hope that some one will study it further, but will
give no elaborate discussion in this paper. Briefly, it is that only those
things appear in a dream which are necessary to express the meaning of the
dream. A few illustrations may make this clear. Every one has noticed the
rarity with which colors and sunshine appear in dreams; I have found,
however, that colors and sunshine always appear if there is any necessity
for their doing so. Some one dreams of a melon and looks to see if it is
ripe; he sees the red color; he dreams of a stream which he thinks is a
sewer and smells it to see if it gives off an odor and finds that it does;
he dreams of pulling his fishing line to see if there is a fish on it and
senses the pull of the fish; I have examples in abundance which go to
indicate that taste, smell, tactual, kinaesthetic, color sensation or any
other kind will appear in a dream when they are called for to complete the
meaning of the dream, but they are not common because they are very rarely
needed. Even in waking life we rarely think in these terms. If this little
principle prove true, it would be easy to understand why certain parts of a
dream are dim without going to the doubtful process of positing a
repression. The persons in the dream were not recognized simply because
there was no need for them to be; the dream expressed the pertinent meaning
just as well without them as with them. They were observed just as many of
us would observe the occupants of a street car in waking life; we could
possibly not describe, even partly, any one of the occupants of the car
which we used on our way to the office or home.

Before leaving this nightmare, I want to call attention again to the somatic