Saint Augustine was one of those towering figures who so dominated his age that the age itself bears his name. the Age of Augustine was a time of transition, and Augustine was a genius of such stature that, according to Christopher Dawson, "he was, to a far greater degree than any emperor or general or barbarian war-lord, a maker of history and a builder of the bridge which was to lead him from the old world to the new."
He was the ablest religious thinker and controversialist at a period when theological controversy reached a level of intellectual refinement never achieved before or since. He was a tireless preacher and he wrote 118 treatises, including the most famous spiritual autobiography of all time, The Confessions. Of all these works, the one most prized by Augustine was his City of God, a veritable encyclopedia of information on the lives, thoughts and aspirations of ancient and early Christian man.
"In plain words--if you can accept them as plain--Christianity is the life and death and resurrection of Christ going on day after day in the souls of individual men and in the heart of society. It is this Christ-life, this incorporation into the Body of Christ, this union with His death and resurrection as a matter of conscious experience, that St. Augustine wrote of in his Confessions."