Freud - Exploring the unconscious mind

"For Freud, the unconscious was a depository for socially unacceptable ideas, wishes or desires, traumatic memories, and painful emotions put out of mind by the mechanism of psychological repression. However, the contents did not necessarily have to be solely negative. In the psychoanalytic view, the unconscious is a force that can only be recognized by its effects - it expresses itself in the symptom." Wikipedia - Unconscious