By James T. Majewski, Catholic Culture - In honor of his feast day today, we’re featuring, for the first time on this podcast, St. Thomas Aquinas. Known as the “Angelic Doctor”, St. Thomas Aquinas is, arguably, the most influential theologian and philosopher that the Church has ever seen… St. Thomas lived well past the time of the Church Fathers, but his magnum opus, The Summa Theologica, is greatly indebted to the Fathers. Along with the Bible and the works of Aristotle, the Church Fathers are cited by him throughout the Summa as among the most authoritative sources.