[8][19] Jerome attacked Pelagianism for saying that humans had the potential to be sinless, and connected it with other recognized heresies, including Origenism, Jovinianism, Manichaeanism, and Priscillianism.
[21] Noting that Jerome was also an ascetic and critical of earthly wealth, historian Wolf Liebeschuetz suggested that his motive for opposing Pelagianism was envy of Pelagius' success.
[19][23] The same year, the exiled Gallic bishops Heros of Arles and Lazarus of Aix accused Pelagius of heresy, citing passages in Caelestius' Liber de 13 capitula.
[8][24] Pelagius defended himself by disavowing Caelestius' teachings, leading to his acquittal at the Synod of Diospolis in Lod, which proved to be a key turning point in the controversy.
[30][27] Many of them later had to seek shelter with the Greek bishops Theodore of Mopsuestia and Nestorius, leading to accusations that Pelagian errors lay beneath the Nestorian controversy over Christology.
[30] Despite repeated attempts to suppress Pelagianism and similar teachings, some followers were still active in the Ostrogothic Kingdom (493–553), most notably in Picenum and Dalmatia during the rule of Theoderic the Great.
Some scholars, including Nowell Myres and John Morris, have suggested that Pelagianism in Britain was understood as an attack on Roman decadence and corruption, but this idea has not gained general acceptance.
[29] According to Pelagianism, humans were created in the image of God and had been granted conscience and reason to determine right from wrong, and the ability to carry out correct actions.
[38][45][49][50] Instead of accepting the inherent imperfection of man, or arguing that the highest moral standards could only be applied to an elite, Pelagius taught that all Christians should strive for perfection.
[38] Specifically, he emphasized the importance of reading scripture, following religious commandments, charity, and taking responsibility for one's actions, and maintaining modesty and moderation.
[52] Although Pelagius rejected that infant baptism was necessary to cleanse original sin, he nevertheless supported the practice because he felt it improved their spirituality through a closer union with Jesus.
Like many medieval theologians, Pelagius believed that instilling in Christians the fear of hell was often necessary to convince them to follow their religion where internal motivation was absent or insufficient.
[38] Significant influences on Pelagius included Eastern Christianity, which had a more positive view of human nature,[37][54][53] and classical philosophy, from which he drew the ideas of personal autonomy and self-improvement.
[1] After having previously credited Cicero's lost Hortensius for his eventual conversion to Christianity,[55] Augustine accused Pelagius' idea of virtue of being "Ciceronian", taking issue with the ideology of the dialogue's author as having overemphasized the role of human intellect and will.
[56][f] Although his teachings on original sin were novel, Pelagius' views on grace, free will and predestination were similar to those of contemporary Greek-speaking theologians such as Origen, John Chrysostom, and Jerome.
[62][63] Bonner argued that the two core ideas promoted by Pelagius were "the goodness of human nature and effective free will" although both were advocated by other Christian authors from the 360s.
In contrast, Augustine argued that Christians should be motivated by the delight and blessings of the Holy Spirit and believed that it was treason "to do the right deed for the wrong reason".
[72] According to Peter Brown, "For a sensitive man of the fifth century, Manichaeism, Pelagianism, and the views of Augustine were not as widely separated as we would now see them: they would have appeared to him as points along the great circle of problems raised by the Christian religion".
[77][78][79] According to Nelson, Pelagianism is a solution to the problem of evil that invokes libertarian free will as both the cause of human suffering and a sufficient good to justify it.
[89] By positing that man could choose between good and evil without divine intercession, Pelagianism brought into question Christianity's core doctrine of Jesus' act of substitutionary atonement to expiate the sins of mankind.
[92] Augustine's solution, while it was faithful to orthodox Christology, worsened the problem of evil because according to Augustinian interpretations, God punishes sinners who by their very nature are unable not to sin.
", this defense (although accepted by many Catholic and Reformed theologians) creates a God-centered morality, which, in Leibniz' view "would destroy the justice of God" and make him into a tyrant.
[100] The controversy centered on differing interpretations of the verse 1 Timothy 2:4:[59] "For this is good and acceptable in the sight of God our Savior, who desires all men to be saved and to come to the knowledge of the truth.
Other semi-Pelagians were said to undermine the essential role of God's grace in salvation and argue for a median between Augustinianism and Pelagianism, although these alleged writings are no longer extant.
[107] According to French scholar Yves-Marie Duval [fr], the Pelagian treatise On the Christian Life was the second-most copied work during the Middle Ages (behind Augustine's The City of God) outside of the Bible and liturgical texts.
[114] He did not accept that original sin corrupted human nature, and argued that man could live a Christian life (although not "void of slips and falls") and be entitled to justification.
[111] Nelson argues that the drive for rational justification of religion, rather than a symptom of secularization, was actually "a Pelagian response to the theodicy problem" because "the conviction that everything necessary for salvation must be accessible to human reason was yet another inference from God's justice".
His anti-Pelagian ideas influenced his book A Theory of Justice, in which he argued that differences in productivity between humans are a result of "moral arbitrariness" and therefore unequal wealth is undeserved.
[122] The conflict between Pelagius and the teachings of Augustine was a constant theme throughout the works of Anthony Burgess, in books including A Clockwork Orange, Earthly Powers, A Vision of Battlements and The Wanting Seed.
His fault was in exaggerated emphasis, but in the final form his philosophy took, after necessary and proper modifications as a result of criticism, it is not certain that any statement of his is totally irreconcilable with the Christian faith or indefensible in terms of the New Testament.