what is comprised of material that was once conscious but has been forgotten or repressed
Unconscious mind 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.[30] 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".[31]