"What, then... is scientific oneirology and what is the value of dreams in psychotherapeutics? The answers to these questions are not difficult. Oneirology, strictly speaking, is the study of dreams, not the interpretation of dreams. The interpretation of dreams, as practised by psycho-analysts, is not a science but the application of a mystical theory derived from the superstitious notions that dreams were symbolic prophesies, or that through dreams the gods communed with mortals, or that dreams were due to the agency of good and bad demons, etc."