The Interpretation of Dreams by Sigmund Freud Chapter 2 Page 42

fact, the most extraordinary misconceptions arise if the dream can be correlated with nothing familiar. Every one is aware that we are unable to look at any series of unfamiliar signs, or to listen to a discussion of unknown words, without at once making perpetual changes through our regard for intelligibility, through our falling back upon what is familiar.

We can call those dreams properly made up which are the result of an elaboration in every way analogous to the psychical action of our waking life. In other dreams there is no such action; not even an attempt is made to bring about order and meaning. We regard the dream as “quite mad,” because on awaking it is with this last-named part of the dream work, the dream elaboration, that we identify ourselves. So far, however, as our analysis is concerned, the