It is understood that Onesimus was Philemon's slave. Whilst in prison for stealing from Philemon, Onesimus met Paul and through their conversations, Onesimus was converted. Paul wrote a letter to Philemon appealing for Onesimus' freedom, so that Onesimus could become one of his own assistants. Later in his life, Onesimus became an ardent preacher of the Gospel and succeeded Timothy as bishop of Ephesus.