Aion occupies a singular position in the depth-psychology corpus, functioning simultaneously as a Mithraic deity, a cosmological principle, and the title of Jung’s 1951 monograph—his most sustained attempt to map the archetype of the Self against the sweep of Western religious history. Jung deployed the figure of Aion, lord of astrological time, to argue that the two-thousand-year Christian aeon constitutes a synchronistic concomitant of the Pisces epoch, within which the tension between Christ and Antichrist enacts the psyche’s unresolved problem of evil and wholeness. Von Franz traces the term’s deeper etymological roots: in Greek antiquity, aion denoted the vital fluid in living beings, their life-span and fate, a generative substance later identified with Chronos and the world-encircling Oceanos. Onians confirms this philological stratum, linking aion to spinal marrow, the snake form, and the diminution of life-force with age. Murray Stein reads Jung’s personal identification with the Mithraic Leontocephalus—the lion-headed, serpent-coiled Deus Aion—as foundational to Jung’s vantage point outside ego-time, from which he surveys the inner history of Christianity and speculates on the coming Age of Aquarius. Edward Edinger and Stephan Hoeller extend this into reflections on the God-image and Gnostic parallels. The term thus bridges philology, comparative religion, analytical psychology, and depth-hermeneutics of cultural epochs.
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 declares Aion the organizing concept of his monograph, framing the Christian aeon as a two-thousand-year psychic situation readable through Gnostic and alchemical symbols of the Self.
, Aion: Researches into the Phenomenology of the Self, 1951thesis
the myth of Aion locates Jung beyond the rule of time—he actually is the ruler over time. Then we can observe how Jung used this association with the transcendent principle behind astrological time to reflect upon the inner history and meaning of Christianity
Stein argues that Jung’s identification with the Aion figure provided him a trans-temporal vantage point from which to interpret the psychological meaning of the Christian era and the coming Age of Aquarius.
, Transformation Emergence of the Self (Volume 7) (Carolyn, 1998thesis
Aion originally denoted the vital fluid in living beings, and thus their life span and allotted fate. This fluid continued to exist after death in the form of a snake. It was a ‘generative substance,’ as was all water on earth and especially Oceanos-Chronos, the creator and destroyer of everything.
Von Franz traces the pre-philosophical stratum of Aion as vital fluid, fate, and serpentine energy, situating the Greek deity within a broader ancient complex linking time, life-force, and cosmic water.
, Psyche and Matter, 2014thesis
The book’s title is taken from the ancient religion of Mithraism, where Aion is the name of a god who rules over the astrological calender and thus over time itself. The title therefore suggests a factor that transcends the time/space continuum that governs ego-consciousness.
Stein identifies the Mithraic Aion as the conceptual origin of Jung’s title, reading it as a signal that the Self, like Aion, operates outside the temporal categories of ordinary ego-consciousness.
, Jung’s Map of the Soul: An Introduction, 1998thesis
The animal face which I felt mine transformed into was the famous [Deus] Leontocephalus of the Mithraic Mysteries, the figure which is represented with a snake coiled around the man, the snake’s head resting on the man’s hand, and the face of the man that of a lion.
Stein documents Jung’s active-imagination identification with the Mithraic Leontocephalus—the iconographic form of Aion—as a transformative encounter with a classical image of deity that shaped his individuation.
, Transformation Emergence of the Self (Volume 7) (Carolyn, 1998supporting
aion (aiwv): identified with the life-fluid, 200-6, 212-15, 251, 254, 507; meaning approximates to ‘fate’, 204-5, but definitely becomes ‘spinal marrow’, 205-6, 208; associated with snake form, 206-7, 251; development of meaning to ‘life’, 208-9
Onians provides the philological groundwork showing that aion in Greek antiquity denoted the bodily life-fluid, spinal marrow, and fate, with an intrinsic association to serpentine imagery that later fed into the Mithraic iconography.
, The origins of European thought about the body, the mind,, 1988supporting
In Aion (Volume 9ii of the Collected Works, published in 1951), Jung taught that the exclusion of the shadow from the conventional God-image of the West has become a rather formidable roadblock on the path to enlightenment
Peterson employs Aion as the source text for Jung’s critique of the Christ-symbol’s one-sidedness, arguing that the exclusion of the dark side from the Western God-image constitutes a collective psychological obstacle.
, The Shadow of a Figure of Light, 2024supporting
Aion, 45, 47 Aion (Jung), 137-38
Stein’s index confirms Aion as a central reference point in his discussion of active imagination and the Self’s emergence, linking it to the Age of Aquarius and Jung’s broader contribution to analytical psychology.
, Transformation Emergence of the Self (Volume 7) (Carolyn, 1998supporting
the devil becomes a psychological inevitability as the incarnation of evil—in other words the devil is the personification of Christ’s split-off dark side. Cf. Aion, CW 9ii, par. 113.
Edinger cites Aion as the locus of Jung’s argument that Christ’s exclusive goodness psychologically necessitates the devil as its repressed dark counterpart, a structural tension endemic to the Christian aeon.
, The New God-Image: A Study of Jung’s Key Letters Concerning the Evolution of the Western God-Image, 1996supporting
Aion, 122, 186, 200
Hoeller’s index positions Aion alongside Abraxas and alchemical themes as a recurring reference in his analysis of the Gnostic dimensions of Jung’s thought.
, The Gnostic Jung and the Seven Sermons to the Dead, 1982aside
time existed potentially from the beginning as a principle connected with the supreme Lord of Time, it actually became manifest only after the creation of the four Tetzcatlipocas… This led to a linear view of time which unfolds in five successive aeons or Suns.
Von Franz draws a comparative parallel between Mesoamerican calendrical aeons and the Hellenistic Aion tradition, suggesting a cross-cultural archetype of cyclical cosmic time presided over by a divine temporal ruler.
, Psyche and Matter, 2014aside