The Apollo-Dionysus duality stands as one of the most generative and contested polarities in the depth-psychological corpus, serving simultaneously as a hermeneutic key to Greek religious experience, a structural model for understanding consciousness and its underside, and a philosophical inheritance mediated primarily through Nietzsche. Nietzsche’s Birth of Tragedy (1872) inaugurated the modern framing, positing Apollo as the principle of individuation, beautiful semblance, and measured form, set against Dionysus as the force of dissolution, ecstatic unity, and the terrifying ground of existence. Subsequent scholarship has both elaborated and complicated this binary. Walter F. Otto, drawing on cultic evidence from Delphi, argues that the polarity is not oppositional but complementary — that only both gods together signify the whole truth, a position corroborated by Kerényi’s meticulous archetypal scholarship on the shared Delphic calendar. Jung, in Psychological Types, interrogates the Nietzschean reconciliation skeptically, reading the Delphic synthesis as a compensatory symbol betraying a violent split in the Greek character. Hillman deploys the duality clinically and phenomenologically, mapping Apollonic detachment against Dionysian involvement as competing therapeutic stances. The duality thus operates in this corpus on at least three registers: religious-historical, psychological-structural, and aesthetic-philosophical.