This most archetypal of symbols can be found all around us: from the folds of coral and the internal structure of the Nautilus shell to the queue settings of Disneyland rides; in the monastic library of Melk in the novel and film In the Name of the Rose and Dorothy's yellow-brick road from The Wizard of Oz, to the hero's journeys undertaken by Neo in the Matrix, Luke Skywalker in Star Wars, and Frodo in The Lord of the...