Today is the Feast of Nineveh, according to the Coptic Calendar.
God destroys sinners not only in anger but also in compassion[.] For sinners are destroyed in two ways: either...the men themselves are punished for their sins, or, like the Ninevites, the men’s sins are destroyed by repentance. God’s prediction, therefore, was fulfilled: the wicked Nineveh was overthrown, and a good Nineveh built up. For its walls and houses remained standing; the city was overthrown in its depraved manners.
-City of God, ch. 24
In other words, Augsutine encourages me to be like Nineveh: to let the sinful me be destroyed and to crush my sins by repentance.