n his book The Interpretation of Dreams, Sigmund Freud suggested that the content of dreams is related to wish fulfillment. Freud believed that the manifest content of a dream, or the actual imagery and events of the dream, served to disguise the latent content, or the unconscious wishes of the dreamer.n his book The Interpretation of Dreams, Sigmund Freud suggested that the content of dreams is related to wish fulfillment. Freud believed that the manifest content of a dream, or the actual imagery and events of the dream, served to disguise the latent content, or the unconscious wishes of the dreamer.