He wrote that visible signs or sacraments were the only means to provide religious unity in his Retractions. He also wrote a book which asserts that Scripture must be interpreted reflecting charity and love, advocates memorizing Scripture, and discusses the role of allegory in On Christian Doctrine. After Rome was sacked, he described the relationship between the title entity, the church, and potentially malevolent pagan 
He wrote that visible signs or sacraments were the only means to provide religious unity in his Retractions. He also wrote a book which asserts that Scripture must be interpreted reflecting charity and love, advocates memorizing Scripture, and discusses the role of allegory in On Christian Doctrine. After Rome was sacked, he described the relationship between the title entity, the church, and potentially malevolent pagan forces in The City of God. A Manichaean convert influenced by Saint Ambrose, for 10 points, identify this author of Confessions.
He wrote that visible signs or sacraments were the only means to provide religious unity in his Retractions.
Saint Augustine of Hippo