Augustine taught that sin entered the world through the Fall, that is, Adam and Eve disobeying God. This sin is inherited by man, and is redeemed in the passion, death and resurrection of Jesus (called the Redemption). So Jesus, as Pope John Paul wrote, is Redemptor Hominis, the Redeemer of Man.
Augustine taught that Evil is a lesser good, or the absence of good.
- And in the universe, even that which is called evil, when it is regulated and put in its own place, only enhances our admiration of the good; for we enjoy and value the good more when we compare it with the evil. For the almighty God, who, as even the heathen acknowledge, has supreme power over all things, being Himself supremely good, would never permit the existence of anything evil among His works, if He were not so omnipotent and good that He can bring good even out of evil. For what is that which we call evil but the absence of good?
Many Christians disagreed with Augustine, as it did not satisfactorily explain the problem of suffering, the existence of sin, and damnation with all that comes with that, Hell.