In 410, Pelagius and Caelestius fled Rome for Sicily and then North Africa due to the Sack of Rome by Visigoths. At the 411 Council of Carthage, Caelestius approached the bishop Aurelius for ordination, but instead he was condemned for his belief on sin and original sin. Caelestius defended himself by arguing that his original sin was still being debated and his beliefs were orthodox. His views on grace were not mentioned, although Augustine (who had not been present) later claimed that Caelestius had been condemned because of "arguments against the grace of Christ". Unlike Caelestius, Pelagius refused to answer the question as to whether man had been created mortal, and, outside of Northern Africa, it was Caelestius' teachings which were the main targets of condemnation. In 412, Augustine read Pelagius' "Commentary on Romans" and described its author as a "highly advanced Christian". Augustine maintained friendly relations with Pelagius until the next year, initially only condemning Caelestius' teachings, and considering his dispute with Pelagius to be an academic one.