Anti-pelagian Writings by St. Augustine
Chapter 18 [XVII.]--The Condemnation of Pelagius.
This being the case, you of course feel that episcopal councils, and the Apostolic See, and the whole Roman Church, and the Roman Empire itself, which by God's gracious favour has become Christian, has been most righteously moved against the authors of this wicked error, until they repent and escape from the snares of the devil. For who can tell whether God may not give them repentance to discover, and acknowledge, and even proclaim His truth, and to condemn their own damnable error? But whatever may be the bent of their own will, we cannot doubt that the merciful kindness of the Lord has sought the good of many persons who followed them, for no other reason than because they saw them associated in communion with the catholic Church.