Like Freud (and Erikson) Jung regarded the psyche as made up of a number of separate but interacting systems. The three main ones were the ego, the personal unconscious and the collective unconscious. According to Jung, the ego represents the conscious mind as it comprises the thoughts, memories, and emotions a person is aware of. The ego is largely responsible for feelings of identity and continuity. Like Freud, Jung (1921, 1933) emphasized the importance of the unconscious in relation to personality. However, he proposed that the unconscious consists of two layers.