Augustine's The City of God is saturated with Scripture. Let's look at a few examples. Right away in the work's preface, Augustine quotes Psalm 94:15 to explain how the City of God waits until “righteousness shall return unto judgment” for the time when it shall be fully glorious. A little...
Augustine's The City of God is saturated with Scripture. Let's look at a few examples. Right away in the work's preface, Augustine quotes Psalm 94:15 to explain how the City of God waits until “righteousness shall return unto judgment” for the time when it shall be fully glorious. A little later in the preface, Augustine again returns to Scripture, this time quoting James 4:6 and 1 Peter 5:5, “God resists the proud, but gives grace to the humble,” to emphasize that God's divine law calls for humility from His people.
As we work our way through the first book, we see that in chapter 7, Augustine once again quotes a psalm, this time Psalm 89:32:
I will visit their transgression with the rod, and their iniquities with stripes; nevertheless my loving-kindness will I not utterly take from them.
He explains how the barbarians attacking Rome actually left various churches alone as sanctuaries for the people. This is God's doing, Augustine explains, for while He allows punishment for sin, He also protects His people because of His love.
In the next chapter, Augustine asks the question of why God would show compassion to the “ungodly and ungrateful.” He answers by quoting Scripture, in this case Matthew 5:35, which explains that God “makes His sun to rise on the evil and on the good, and sends rain on the just and on the unjust.” He goes on to show, using Romans 2:4, that God does this in order that some of the wicked may repent of their ways.
So far, then, we have quotations from the Psalms, the Gospels, and several New Testament letters, but Augustine also quotes the prophets (Ezekiel in book 1, chapter 9 for instance), refers to Job as a case study for how God tests the human spirit, and quotes or mentions many other different books of Scripture. He continues this throughout The City of God.