2 Tim. 1:18. May the Lord grant him to find mercy from the Lord in that day.
Onesiphorus, says the apostle, showed me mercy; therefore may he receive recompense on that fearful day; then much mercy is needed by all, even by the saints. If Onesiphorus, who exposed himself to obvious dangers for Christ, will be saved by mercy, how much more so we. The followers of the Marcionite heresy appeal to this passage, saying: so then, there are two Lords? By no means. There is one Lord, as the apostle Paul himself says elsewhere (Eph. 4:5). This expression is commonly used in Holy Scripture, as for example: "and the Lord rained fire from the Lord" (Gen. 19:24), that is, through Himself. So also in this passage. If we accept that here both the Father and the Son are indicated, there is nothing strange in this. As the Father is Lord, so also the Son is Lord, and the Holy Spirit is Lord: but there is one Lord, manifested in three persons. Notice, the apostle did not say: may the Lord give him something else, but rather — mercy.
2 Tim. 1:18. And how much he served me in Ephesus, you know better.
He was accustomed, he says, to good deeds: he did not do me good only once, but both in Ephesus and in Rome. Such is what a Christian ought to be, always doing good, throughout his entire life.