Exposition of the Old and New Testament, by John Gill, [1746-63], at sacred-texts.com
This epistle was written by the Apostle Paul, when a prisoner at Rome, as appears from its inscription and subscription; and seems to have been written at the same time, in the year 60, and sent by the same hand, as the epistle to the Colossians; seeing the same persons were with the apostle at the writing of both, and send their Christian salutations in the one, as in the other; compare Plm 1:23 with Col 4:10 and Archippus, the minister in Colosse, is made mention of in both, Plm 1:2 and it is very probable that Philemon, to whom it was written, was a Colossian, since Onesimus, his servant, on whose account, and by whom it was sent, is said to be one of the Colossians, Col 4:9. Philemon is said to be one of the seventy disciples, and afterwards Bishop of Gaza; Luk 10:1. The occasion of the epistle was this; Philemon's servant, Onesimus, having either embezzled his master's goods, or robbed him, ran away from him, and fled to Rome, where the apostle was a prisoner in chains in his own hired house, under the custody of a soldier, and where he received all that came, and preached the Gospel to them, Act 28:30 and among those that went to hear him, this fugitive servant was one, and was converted under his ministry; and who not only received the grace of God, but had such gifts bestowed on him as qualified him to be a preacher of the word. Now the design of this epistle is to reconcile Philemon to his servant, and to entreat him to receive him again, not only as a servant, but as a brother in Christ; and the most proper and prudent methods and arguments are used to engage him to it. The epistle, though it is a familiar one, and short, is very instructive; it shows great humility in the apostle, and that he did not think it below him to be concerned in doing such an office as to reconcile a master to his servant, and which is worthy of imitation; as also it teaches the right that masters have over their servants, which is not lost by their becoming Christians, and even ministers of the Gospel; and that recompense should be made unto them for injuries done by them: it likewise displays the riches of the grace of God, in the conversion of such a vile creature: and the wonderful providence of God in overruling that which was sinful in itself, running away from his master, to the greatest good, even the conversion of him; and is an instance of surprising grace: and from hence may be learned, that there is salvation in Christ for the chief of sinners; and that the conversion of them is not to be despaired of. The authority of this epistle was not questioned by the ancient writers, and stands always in their catalogues of the canon of the Scripture; and Marcion the heretic, who either rejected, or changed, or mutilated the rest of the epistles, could not lay his hands on this, because of the brevity of it, as Tertullian (a) and Jerom (b) observe.
(a) Advers. Marcion. l. 5. c. 21. (b) Proaem. in Philem.