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.
The Simple and Unchangeable Trinity
This discussion of creation leads to a consideration of the Creator’s nature. Augustine expounds the Trinity: Father, Son, and Holy Spirit, one God, simple and unchangeable. In God, substance and quality are identical; He is what He has. Unlike composite beings, God’s attributes are not distinct from His essence. The Father begets the Word (Wisdom), co-eternal and consubstantial with Him. The Holy Spirit is the Spirit of both, equally divine. The Trinity is one in substance, three in persons—distinguished by relational properties, not by essence.
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