Augustine was a brilliant genius and a prolific writer. In his lifetime he wrote 113 books, over 200 letters and more than 500 sermons. His most famous works are his Confessions and the City of God.
In his Confessions, he reveals his sinfulness and conversion ever mindful of the work of God in his soul. It has been read by countless men and women because it speaks to each soul's sinfulness and need for redemption.
In the City of God Augustine refutes the accusation that the Christians caused the fall of the Roman Empire by their refusal to worship the gods of Rome. In chapter 1 he makes this observation: "If they only had sense, they would see that the hardships and cruelties they suffered from the enemy came from that Divine Providence who makes use of war to reform the corrupt lives of men." He reveals the Christian view of history by contrasting the city of men, the Roman Empire, which had fallen due to the breakdown of morality and civic virtues, with the City of God, the Church, who's foundation is Christ who leads men to the heavenly City of God.
Augustine's third great work De Trinitate (On the Trinity) is not widely read because of its abstract nature which is more suited to study by theologians. In this work, he compares the mind of man with the mind of God. Since man is the image of God, Augustine reveals the Trinitarian structure of human nature. For example, mind, love and knowledge are substantially one, yet each one is present in the other without losing their characteristics. He goes on to discuss different aspects of the Trinity and to refute the errors of the heretics.
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