Aion

Written in Carl Jung's seventies, when he was concerned with the relations among psychology, alchemy and religion, the study takes the Self as its central theme. Jung treats the figure of Christ as the traditional historical counterpart of the Self, and asks why Christianity arose when it did. He develops the thesis through the Allegoria Christi, above all the fish, which stands for the devil as well as Christ, and through Gnostic and alchemical symbolism, read as phenomena of cultural assimilation. The problem of opposites, especially good and evil, is a further concern. Its opening four chapters summarize the ego, the shadow, anima and animus. It was first published in German in 1951.

Jordan B. Peterson included it among the suggested readings for Maps of Meaning.