

In The Interpretation of Dreams, challenging the dominant scientific theories of his time for which the dream is not a mental act, but a somatic process revealed only by certain psychic signs, he argues that dreams are "psychic acts" and that they are “nothing more than a special form of our thinking, which is made possible by the conditions of the sleeping state”. On the one hand, it was a moment of systematisation of the analytical theory that would become metapsychology, and on the other hand, it was a book that made psychoanalysis known, but not without raising a lot of criticism. For the first time, a scientific approach to dreams was attempted.

Sigmund Freud's fundamental work The Interpretation of Dreams marks an important date in the history of psychoanalysis.
