The City of God stands as Augustine's masterwork of theological defense and construction, written over thirteen years in response to accusations that Christianity brought ruin upon Rome. This first volume contains the first ten books of sustained refutation—demolishing pagan claims that traditional worship secured either temporal prosperity or eternal happiness—followed by the beginning of his positive vision in Books Eleven through Thirteen, where he traces the origin of two societal orders to the primordial division among the angels. What emerges is not merely an apology for Christianity but a philosophy of history that subordinate the fate of empires to the hidden providence of the one true God, whose sovereignty extends from creation through the fall to the final judgment.
He addresses the apostle Paul’s reference to “eternal times” in the past, understanding this to mean that in God’s eternity and co-eternal Word, what was to be manifested in time was already predestined. Augustine strongly defends God’s unchangeable counsel against the reasonings of the cyclical philosophers. These philosophers argue that God’s knowledge cannot comprehend the infinite, and therefore He must repeat the same finite cycles to know His works. Augustine shatters this argument by affirming that God’s knowledge is infinite and comprehends all numbers, which are infinite in their multitude. If God can comprehend infinite numbers, He does not need repetitive cycles to know His creatures. His knowledge is simple and eternal, foreknowing all things without succession of thought.
Finally, Augustine considers the phrase “ages of ages,” debating whether it implies a succession of worlds or the eternal causes of temporal ages. Regardless of the interpretation, he argues that it does not substantiate the cycles of misery and blessedness. He concludes with a powerful refutation of the impiety of suggesting that the blessed must return to misery in these cycles. He argues that such a view paralyzes love, for who would love God faithfully if they knew they must eventually abandon Him? True religion promises eternal, uninterrupted blessedness, and Augustine urges the reader to keep to the straight path of Christ, turning away from the futile circles of the godless. He notes that even Porphyry, a Platonist, eventually rejected the idea of cyclical return, likely sobered by the knowledge of Christianity.
Augustine opens by dismantling the Platonic teaching that souls revolve through endless cycles of misery and deliverance. If the soul, once liberated from suffering, is never again subjected to it, then something has occurred in its experience that possesses no precedent. This single, unrepeatable transition into lasting blessedness stands as a genuine novelty—one that no rotational model of history can accommodate. The objection that nothing genuinely new can arise in nature therefore collapses. Even granting that a soul’s fall into wretchedness came about through imprudence rather than divine appointment, the providential order already made room for both the lapse and its remedy, which shows that unprecedented events can unfold within, not outside, the fabric of nature as governed by God. Those who insist that souls have always existed, cycling through bodies from eternity, face a further dilemma: to supply an endless succession of embodied beings, the store of pre-existing souls would need to be limitless—yet a truly infinite multitude sits uneasily alongside the philosophers’ own conviction that the natural order is finite and fully comprehended by the divine mind.
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