That is, that God was in Christ, reconciling the world unto himself, not imputing their trespasses unto them; and has committed unto us the word of reconciliation.
All Commentaries on 2 Corinthians 5:19 Go To 2 Corinthians 5
Ambrosiaster
AD 400
God was in Christ, that is to say, the Father was in the Son, reconciling the world to himself, not counting their sins against them. Creation sinned against God and did not repent, so God, who did not want his work to perish, sent his Son in order to preach through him the forgiveness of sins and thus reconcile them to himself. Commentary on Paul’s Epistles.