" Paul is not only urging and requesting but actually embodying what he elsewhere calls ‘the ministry of reconciliation’. God was in the Messiah, reconciling the world to himself, he says in 2 Corinthians 5.19; now, we dare to say, God was in Paul reconciling Onesimus and Philemon. "

― N.T. Wright , Paul and the Faithfulness of God (Christian Origins and the Question of God, #4)