While the theology of Augustine shown in this article by Gregory Baum is quite sound, I am always fearful of adding to the exaltation of Augustine which has been a seriously negative influence of Western Christianity in other ways. Namely his supporting violence against Christians who did not support the orthodox view. This is why Augustine is called by some "The father of the Inquisition."  Secondly, his alignment with the Roman military and his "just war" theory have given justification to many evil wars by Christians. 

Gregory Baum notes how the society that Augustine lived in was pluralistic.  Augustine, however, was not tolerant of beliefs different than his which was shown by his support of suppression of Christians who disagreed with him. 

Finally, an argument can be made for serious narcissism in the prolific writer Augustine. He is often cited today as the prototype of the memoir which is a staple of our age.  Our narcissistic era is shameless in that exhibition.