St. Augustine was born in what is present day North Africa in the town of Thagaste. His mother was Christian and his father a pagan. After getting an education in rhetoric, he traveled to Carthage, Rome, and Milan to teach.
At one point, St. Augustine saw the world as being ruled by opposing forces of good and evil. In Milan, however, Archbishop Ambrose converted him to Christianity.
As a result, St. Augustine devoted himself to writing on Christianity and many of his works are quite philosophical in nature. Eventually he became the Bishop of Hippo in North Africa, where he remained for the remaining part of his life.