the centre is symbolized by a star… The picture shows the self appearing as a star out of chaos. The four-rayed structure is emphasized by the use of four colours. This picture is significant in that it sets the structure of the self as a principle of order against chaos.
Jung identifies the star as a mandala symbol of the Self, structuring psychic order against the formlessness of chaos, with its four-rayed form corresponding to quaternity and wholeness.
, The Archetypes and the Collective Unconscious, 1959thesis