Perhaps Freud's single most enduring and important idea was that the human psyche (personality) has more than one aspect.

Freud's personality theory (1923) saw the psyche structured into three parts (i.e., tripartite), the id, ego and superego, all developing at different stages in our lives. These are systems, not parts of the brain, or in any way physical.

According to Freud psychoanalytic theory, the id is the primitive and instinctual part of the mind that contains sexual and aggressive drives and hidden memories, the super-ego operates as a moral conscience, and the ego is the realistic part that mediates between the desires of the id and the super-ego.

WTF boys? Is this real?