A Christian is a new creation because life in Christ brings a decisive new allegiance, reconciliation with God, renewed thinking, and transformed conduct.
Reconciliation and New Creation: The Inauguration of Eschatological Peace – 2 Corinthians 5:17; Ephesians 2:15
Paul's doctrine reveals that reconciliation through Christ creates a new humanity, uniting all believers beyond ethnicity and previous distinctions.
Baptism and the New Creation Paradigm – 2 Corinthians 5:17; Galatians 6:15
Paul teaches baptism is the entrance into the new creation—where believers die to the old age and are reborn into Christ’s eschatological new humanity.

