Onesimus, a runaway slave, finds faith in Christ after meeting Paul in prison. Paul writes a letter to Philemon, Onesimus' owner, asking him to accept Onesimus back not as a slave but as a beloved brother. Paul's letter promotes reconciliation between Onesimus and Philemon through their shared faith. It also hints at Paul's own reconciliation with Mark, who had previously abandoned Paul on a missionary journey, as the two now work together again in ministry. The book of Philemon models how faith in Christ can overcome divisions and foster forgiveness and community.