the panther, as is well known, appears in descriptions of a later period as the favorite animal of Dionysus and is found with him in countless works of art. As Philostratus tells us, the panther leaps as gracefully and lightly as a Bacchant, and this is the reason the god loves him so.
Otto establishes the panther as the quintessential Dionysian animal, uniting Bacchantic grace with intractable savagery as the dual signature of the god’s nature.
, Dionysus Myth and Cult (1965), 1965thesis