This is a general exhortation to walk as becomes our Christian profession. Paul was now a prisoner at Rome; and he was the prisoner of the Lord, or in the Lord, which signifies as much as for the Lord. See of this, ch. iii. 1. He mentions this once and again, to show that he was not ashamed of his bonds, well knowing that he suffered not as an evil doer: and likewise to recommend what he wrote to them with the greater tenderness and with some special advantage. It was a doctrine he thought worth suffering for, and therefore surely they should think it worthy their serious regards and their dutiful observance. We have here the petition of a poor prisoner, one of Christ's prisoners: "I therefore, the prisoner of the Lord, beseech you," &c. Considering what God has done for you, and to what a state and condition he has called you, as has been discoursed before, I now come with an earnest request to you (not to send me relief, nor to use your interest for the obtaining of my liberty, the first thing which poor prisoners are wont to solicit from their friends, but) that you would approve yourselves good Christians, and live up to your profession and calling; That you walk worthily, agreeably, suitably, and congruously to those happy circumstances into which the grace of God has brought you, whom he has converted from heathenism to Christianity. Observe, Christians ought to accommodate themselves to the gospel by which they are called, and to the glory to which they are called; both are their vocation. We are called Christians; we must answer that name, and live like Christians. We are called to God's kingdom and glory; that kingdom and glory therefore we must mind, and walk as becomes the heirs of them.
Exhortation to Unity; Persuasives to Unity. (a. d. 61.)