Freud's discovery that the dream is the means by which the unconscious can be explored is undoubtedly the most revolutionary step forward in the entire history of psychology. Dreams, according to his theory, represent the hidden fulfillment of our unconscious wishes. Through them inhibitions are released and tensions relaxed. The ability to interpret these manifestations of conflict in the human psyche has opened a vast new realm of investigation, particularly invaluable in the treatment of neuroses. By his pioneer investigations into the world of dreams, Sigmund Freud has created a transformation in our generation's thinking. The Interpretation of Dreams is offered here in the translation by Dr. A. A. Brill, who for almost forty years was the translator and standard-Bearer of Freudian theories in America.