This thesis examines Augustine's relation to Academic Skepticism through a detailed commentary on the dialogue Against the Academics. In it is demonstrated the significance of epistemological themes for Augustine and their inseparability from practical and religious concerns. It is also shown how these issues unfold within the logic of Augustine's trinitarianism, which informs the argument even of his earliest works. This, in turn, demonstrates the depth of the young Augustine's engagement with Christian categories in works often thought to be determined wholly, or almost wholly, by the logic of Plotinian Neo-Platonism. / Thesis / Doctor of Philosophy (PhD)