May 6, 2006, was the 150th anniversary of Freud's birth. His ideas have influenced an entire century of human thought. Two of Freud's most influential ideas are: we are not aware of many aspects of our own mental activities; and we are not as rational as we think we are.
Other core ideas of Freud's include: sensory experiences in childhood have profound significance for adult life; dreams always have meaning; and free association on a bed set up by a clinical psychiatrist can alleviate psychological tension and improve mental function. -psytopic.com