We have always held Augustine a man of holy memory because of his life and also of his services in our communion, nor has even report ever sullied him with unfavorable suspicion. We recall him as having once been a man of such great knowledge that even by my predecessors in the past he was always accounted among the best teachers. (Ep. 21 “Apostolici Verba Praecepti” to the Bishops of the Gaul, 431)
Pope Celestine I excommunicated Nestorius, procured the condemnation of the Pelagians at the Council of Ephesus and sent St. Patrick to Ireland.