St. Sixtus III
He was elected to the death of Pope St. Celestine I, in 432, and occupied the See of Peter for eight years were very full of demands. During his lifetime he was involved almost permanently in the fight against the Pelagian doctrine, one of those who first detected the evil and fought the heresy that had to condemn the Pope Zosimus. In fact, Sixtus wrote two letters on this matter by sending them to Aurelius, bishop condemned Caelestius at the Council of Carthage, and St. Augustine. It was about the Church's great controversy about the supernatural grace and therefore need to perform good works for salvation. Pelagius was a monk from the British Isles. He lived in Rome for several years gaining the respect and admiration of many for his ascetic life and his doctrine of stoic type, according to which man can attain perfection by his own effort, with God's help only extrinsic-kind examples, guidelines and disciplinary norms, and so on., - was a proactive! Furthermore, the doctrine...