Philemon 1:1 - Coke's Commentary on the Holy Bible

Paul, a prisoner, &c.— St Paul intimates, Philemon 1:8-9 that he chose to lay aside all his apostolic authority, and to beg it as a favour of Philemon to be reconciled to Onesimus; and, in order to touch and melt the heart of Philemon, he begins with styling himself a prisoner of Jesus Christ. This affable and condescending manner of address must be owned to be more agreeable and engaging than that of authority and command. The apostle might here call Timothy the brother, and not his son, as he does elsewhere, to add weight and dignity to his character, and thereby render his name of more moment in behalf of Onesimus. Whoever contributed any way towards helping forward the gospel, were called the apostle's fellow-labourers. See Philemon 1:24.