Set theory of the problem of the whole: the whole is greater than the sum of its parts . Gestalt theory and the problem of the whole: the whole is other than the sum of the parts . Marx"s primary interest lies with the representation of social reality, while. Lacan is concerned with the representation of psychical reality. Freud"s human psyche model: the id, ego, super-ego. Lacan is influenced by both marx"s analysis of capitalism and hegel"s master- The mirror stage describes the formation of the ego via the process of identification: we have only to understand the mirror-phase as an identification . The image as a whole, but it lacks of the real body. To resolve this aggressive tension, the subject identifies with the image. Leading the child to perceive a fragmented body is the product of misunderstanding. Ego is the product of a false recognition.