<P> Carl Gustav Jung , a Swiss psychiatrist , developed the concept further . He agreed with Freud that the unconscious is a determinant of personality , but he proposed that the unconscious be divided into two layers : the personal unconscious and the collective unconscious . The personal unconscious is a reservoir of material that was once conscious but has been forgotten or suppressed , much like Freud 's notion . The collective unconscious , however , is the deepest level of the psyche , containing the accumulation of inherited psychic structures and archetypal experiences . Archetypes are not memories but images with universal meanings that are apparent in the culture 's use of symbols . The collective unconscious is therefore said to be inherited and contain material of an entire species rather than of an individual . Every person shares the collective unconscious with the entire human species , as Jung puts it : ( the ) `` whole spiritual heritage of mankind 's evolution , born anew in the brain structure of every individual '' . </P>
what is comprised of material that was once conscious but has been forgotten or repressed
The personal unconscious