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The five works of Augustine translated in this volume (De immortalitate animae, De quantitate animae, De musica, De utilitate credendi, and De fide rerum quae non videntur) are focused on the nature of the soul, its ability to find knowledge, and its relationships with the body, with the cosmos, and with God. All written within the first dozen years after Augustine's conversion, they display themes that are consistent with each other and that, when viewed in combination, add up to a belief in an incorporeal, immeasurable, and immortal soul in every human being that is in harmony with the universe and has access to the knowledge of unseen realities.