What metaphors are used in Brecht on Theatre: The Development of an Aesthetic by Bertolt Brecht?

Brecht does not employ metaphor in the text. He does, however, note that in Oedipus, both the Ancient Greek myth and the Classical Greek dramas based on that myth, Oedipus was an ancient king, powerful and revered, who, in unconscious fulfillment of an even more ancient prophecy, killed his father and married his mother. When he found out what he had done, he blinded himself and set to wandering in the wilderness. His story can be seen as a metaphoric dramatization of the dangers of hubris (believing oneself to be godlike) and living life in a state of unawareness.