The theme of this work is the idea of the Aeon (Greek, Aion). My investigation seeks, with the help of Christian, Gnostic, and alchemical symbols of the self, to throw light on the change of psychic situation within the 'Christian aeon.'
Jung states the foundational programme of Aion: to use cross-traditional symbols of the Self to illuminate the psychological transformation occurring within the Pisces aeon, framed by the Christ–Antichrist enantiodromia.
, Aion: Researches into the Phenomenology of the Self, 1951thesis