The picture of the bacchante who stands motionless and stares into space must have been well known. Catullus is thinking of her when he tells of the abandoned Ariadne, who follows her faithless lover with sorrowing eyes as she stands on the reedy shore ‘like the picture of a maenad.’ Indeed, melancholy silence becomes the sign of women who are possessed by Dionysus. […]Madness dwells in the surge of clanging, shrieking, and pealing sounds, it dwells also in silence. The women who follow Dionysus get their name, maenads, from this madness. Possessed by it, they rush off, whirl madly in circles, or stand still, as if turned to stone.
Walter F. Otto, Dionysus: Myth and Cult
dionysus, madness, mythology