The doctrine of original sin is a pivotal concept in Christian theology, described in Ephesians chapter 2. According to Saint Augustine, the fall of Adam affected humanity at its core, leaving us in a state of moral inability. This concept is contrasted with the views of Pelagius, who argued that humanity remains morally capable of living lives of perfect righteousness. The order of salvation, or ordo salutis, is also explored, highlighting the role of God's initiative in regeneration and the importance of faith in Christ.
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