Homer's two central heroes, Odysseus and Achilles, are in many ways differing manifestations of the same themes. While Achilles' character is almost utterly consistent in his rage, pride, and near divinity, Odysseus' character is difficult to pin down to a single moral; though perhaps more human than Achilles, he remains more difficult to understand. Nevertheless, both heroes are defined not by their appearances, nor by the impressions they leave upon the minds of those around them, nor even so much by the words they speak, but almost entirely by their actions. Action is what drives the plot of both the Iliad and the Odyssey, and action is what holds the characters together. In this respect, the theme of humanity is revealed in both Odysseus and Achilles: man is a combination of his will, his actions, and his relationship to the divine. This blend allows Homer to...