Book VII, Chapter 6

Augustine does not say this explicitly, but astrology was a very important part of Manichean belief, as well as part of the beliefs of many other people at the time. I learned it from T.V., on EWTN, from the show titled, Fathers of the Church. Augustine explains how it became proved to him that astrology was without merit. Some of Augustine’s friends were critical in convincing him—Nebridius, Vindicianus, and Firminus. Ultimately, he became convinced of astrology’s uselessness after observing the life of two babies that were born at exactly the same time and of the life of twins, and seeing how radically different their life histories were.