Freud reports that his early conviction that neuroses stem from real childhood sexual abuse collapsed because the implied frequency of paternal abuse was implausible and because the unconscious cannot distinguish truth from emotionally charged fiction. He concludes that remembered seductions may be fantasies, shifting the causal weight from external events to internal wishes.
Freud formulates that every dream represents the fulfillment of a repressed wish, encoded through distortion so the sleeper can preserve rest without confronting the wish directly. The dream's remembered surface (manifest content) is a censored translation of the underlying desire (latent content).
Freud analyzes his own dream in which he blames a colleague's unsterile needle for a patient's illness, discovering the dream absolves him of responsibility for her failed treatment. He uses this single self-analysis as the demonstration case grounding his general wish-fulfillment theory.
Freud treats his own mind, including his grief after his father's death and his recollected childhood feelings, as the primary laboratory for building theory, reporting his resistances and associations as data. This positions the investigator's introspection, rather than external observation of patients alone, as a legitimate source of psychological knowledge.