The Interpretation of Dreams by Sigmund Freud Chapter 8 Page 46

formation. But from the moment that the suppressed thoughts are powerfully occupied by the unconscious wish-feeling and abandoned by the foreconscious occupation, they succumb to the primary psychic process and strive only for motor discharge; or, if the path be free, for hallucinatory revival of the desired perception identity.

We have previously found, empirically, that the incorrect processes described are enacted only with thoughts that exist in the repression. We now grasp another part of the connection. These incorrect processes are those that are primary in the psychic apparatus; they appear wherever thoughts abandoned by the foreconscious occupation are left to themselves, and can fill themselves with the uninhibited energy, striving for discharge from the unconscious. We may add a few further observations to