The tales told of Orpheus are legion. He is said to have been an Argonaut--and to have saved Jason's life. Rivers are reported to have stopped their flow to listen to the sounds of his lyre and his voice. Plato cites his poetry and Herodotus refers to "practices that are called Orphic." Did Orpheus, in fact, exist? His influence on Greek thought is undeniable, but his disciples left little of substance behind them. Indeed, their Orphic precepts...