Read the excerpt from Part 2 of The Odyssey. Out of the cave the mammoth Polyphemus roared in answer: ‘Nohbdy, Nohbdy's tricked me, Nohbdy's ruined me!’ To this rough shout they made a sage reply: ‘Ah well, if nobody has played you foul there in your lonely bed, we are no use in pain given by great Zeus. Let it be your father, Poseidon Lord, to whom you pray.' What theme is best revealed by this conflict?