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Paul of Tarsus (c. 5–67 CE) was a first-century Jewish-Christian theologian and apostle whose epistles constitute approximately half of the New Testament canon. A former Pharisee who underwent a conversion experience on the road to Damascus, he became the primary architect of early Christian theology, articulating doctrines on justification by faith, grace, and the relationship between the Mosaic law and the new covenant. His missionary journeys across the Roman Empire established Christian communities from Antioch to Rome and shaped the trajectory of Western religious thought.
Articulated the doctrine of justification by faith apart from works of the law, foundational to Protestant and Catholic soteriology
Developed the 'body of Christ' ecclesiology as a model of unified, differentiated Christian community
Authored thirteen canonical epistles that became primary sources for Christian ethics, eschatology, and Christology
Synthesized Jewish covenantal theology with Hellenistic philosophical and rhetorical frameworks
Conducted missionary journeys establishing churches throughout Asia Minor, Greece, and Rome