Oneness itself is revealed to Greek myth and cult as the deity who is mad—as Dionysus. His duality has manifested itself to us in the antitheses of ecstasy and horror, infinite vitality and savage destruction
Otto argues that Dionysiac madness is not accidental but constitutive of the god’s metaphysical identity as the paradoxical unity of life and death, ecstasy and horror.
, Dionysus Myth and Cult (1965), 1965thesis