This phase of non-differentiation produces the golden egg, which is both man and universe and yet neither, but an irrational third.
Jung defines the Cosmic Egg as the archetypal product of pre-differentiated consciousness, a symbol that transcends the subject-object split and functions as an ‘irrational third’ beyond either anthropological or cosmological reduction.
, The Archetypes and the Collective Unconscious, 1959thesis