15548. FREUD'S THEORY OF THE UNCONSCIOUS. Freud argued that there is a large part of the mind that cannot be consciously known; yet this unconscious part of the mind has an impact on human behavior. Although the unconscious is beyond the rational mind, Freud argued that psychoanalytic techniques can be used to bring repressed memories to consciousness, so they can be worked on and "healed." 6p., 18f., 3b.