The Interpretation of Dreams by Sigmund Freud Chapter 6 Page 8

The differences are here the same as those found in the gradual decline of the originally distinct visual imagination.

In general, however, I am of the opinion that unfulfilled wishes of the day are insufficient to produce a dream in adults. I readily admit that the wish instigators originating in conscious like contribute towards the incitement of dreams, but that is probably all. The dream would not originate if the foreconscious wish were not reinforced from another source.

That source is the unconscious. I believe that the conscious wish is a dream inciter only if it succeeds in arousing a similar unconscious wish which reinforces it. Following the suggestions obtained through the psychoanalysis of the neuroses, I believe that these unconscious wishes are always active and ready for