The Moebius Strip.

The Moebius Strip is just one of the many figures Lacan used to describe his topological thinking. Lacan believed that Freud had fallen into the 'trap' of not dismissing any notion of physical relativity by dividing the human psyche into the id, the ego and the super-ego, thereby giving the impression to the casual viewer that there were essentially three distinct entities. Topology, though describing a space, does not deal with area, size or any …

…it is in fact the way it is formed in the first place. Physically we show it by the two ends of the Moebius Strip not 'stitching' together properly and thus not allowing the free flow of information between the unconscious and the conscious and therefore not being able to deal with the return of the signifier. References: Evans, Dylan. An Introductory Dictionary of Lacanian Psychoanalysis. Published by Routledge, 1996. Freud, Sigmund. The Neuro-Psychoses of Defence. 1894.