1:15-18 The apostle mentions the constancy of Onesiphorus; he oft refreshed him with his letters, and counsels, and comforts, and was not ashamed of him. A good man will seek to do good. The day of death and judgment is an awful day. And if we would have mercy then, we must seek for it now of the Lord. The best we can ask, for ourselves or our friends, is, that the Lord will grant that we and they may find mercy of the Lord, when called to pass out of time into eternity, and to appear before the judgment seat of Christ.
16. The Lord give mercy—even as Onesiphorus had abounded in works of mercy.
the house of Onesiphorus—He himself was then absent from Ephesus, which accounts for the form of expression (2Ti 4:19). His household would hardly retain his name after the master was dead, as Bengel supposes him to have been. Nowhere has Paul prayers for the dead, which is fatal to the theory, favored by Alford also, that he was dead. God blesses not only the righteous man himself, but all his household.
my chain—Paul in the second, as in his first imprisonment, was bound by a chain to the soldier who guarded him.