Evil in Thalaba the Destroyer

Maybe I am simply stuck in my thesis train of thought in working on Vanity Fair, but I read Thalaba's journey as a kind of pilgrim's progress. I would argue that Southey presents a versione of the "everyman" in cataloguing his various sorrows, griefs and weaknesses. Thalaba, as a moral and Muslim representative, is chosen by the gods to destroy the sorcerers, who can be grouped as the main force of evil. At various points in the poem, Thalaba, like his moral predecessor Adam, is given the option to choose between good and evil. And just like Adam, he ultimately loses his innocence.

Evil is primarily portrayed in two ways, either embodied in the characters of the Domdaniel or within Thalaba himself. With evil living within him, a fall is imminent. Ironically, Thalaba's moral fall occurs in an act of conquest over Aloadon. This conquest brings up feelings of self-importance and Thalaba falls victim to his pride. How, then, is Thalaba to destroy evil when he cannot recognize his own sinful, or evil, tendencies?

Oneiza's death is arguably swift retribution for his sin. Yet Thalaba learns to recognize evil from these experiences with pride and death. Before his final confrontation with the Domdaniel, he learns that he cannot conquer evil without humility and faith. In conquering evil, does Thalaba ultimately overcome himself? Does the fact that Thalaba destroys the Domdaniel have any bearing on whether or not evil still has dominion?