The Interpretation of Dreams by Sigmund Freud Chapter 7 Page 1

Since we know that the foreconscious is suspended during the night by the wish to sleep, we can proceed to an intelligent investigation of the dream process. But let us first sum up the knowledge of this process already gained. We have shown that the waking activity leaves day remnants from which the sum of energy cannot be entirely removed; or the waking activity revives during the day one of the unconscious wishes; or both conditions occur simultaneously; we have already discovered the many variations that may take place. The unconscious wish has already made its way to the day remnants, either during the day or at any rate with the beginning of sleep, and has effected a transference to it. This produces a wish transferred to the recent material, or the suppressed recent wish comes to life again through a reinforcement from the unconscious.