The Interpretation of Dreams by Sigmund Freud Chapter 9 Page 13

unconscious, which we do not as yet find distinguished by the psychologists. Both are unconscious in the psychological sense; but in our sense the first, which we call Unc., is likewise incapable of consciousness, whereas the second we term “Forec.” because its emotions, after the observance of certain rules, can reach consciousness, perhaps not before they have again undergone censorship, but still regardless of the Unc. system. The fact that in order to attain consciousness the emotions must traverse an unalterable series of events or succession of instances, as is betrayed through their alteration by the censor, has helped us to draw a comparison from spatiality.

We described the relations of the two systems to each other and to consciousness by saying that the system Forec. is like a screen between the