15 For perhaps he therefore departed for a season, that thou shouldest receive him for ever;
[AD 407] John Chrysostom on Philemon 1:15-16
Ver. 15, 16. "For perhaps he was therefore parted from you for a season that you should have him for ever; no longer as a bond-servant."

He has well said, "perhaps," that the master may yield. For since the flight arose from perverseness, and a corrupt mind, and not from such intention, he has said, "perhaps." And he has not said, therefore he fled, but, therefore he was "separated," by a more fair sounding expression softening him the more. And he has not said, He separated himself, but, "he was separated." For it was not his own arrangement that he should depart either for this purpose or for that. Which also Joseph says, in making excuse for his brethren, "For God did send me hither" [Genesis 45:5], that is, He made use of their wickedness for a good end. "Therefore," he says, "he was parted for a season." Thus he contracts the time, acknowledges the offense, and turns it all to a providence. "That you should receive him," he says, "for ever," not for the present season only, but even for the future, that you might always have him, no longer a slave, but more honorable than a slave. For you will have a slave abiding with you, more well-disposed than a brother, so that you have gained both in time, and in the quality of your slave. For hereafter he will not run away. "That you should receive him," he says, "for ever," that is, have him again.

"No longer as a bond-servant, but more than a bond-servant, a brother beloved, especially to me."

You have lost a slave for a short time, but you will find a brother for ever, not only your brother, but mine also. Here also there is much virtue. But if he is my brother, you also will not be ashamed of him. By calling him his son, he has shown his natural affection; and by calling him his brother, his great good will for him, and his equality in honor.

Moral. These things are not written without an object, but that we masters may not despair of our servants, nor press too hard on them, but may learn to pardon the offenses of such servants, that we may not be always severe, that we may not from their servitude be ashamed to make them partakers with us in all things when they are good. For if Paul was not ashamed to call one "his son, his own bowels, his brother, his beloved," surely we ought not to be ashamed. And why do I say Paul? The Master of Paul is not ashamed to call our servants His own brethren; and are we ashamed? See how He honors us; He calls our servants His own brethren, friends, and fellow-heirs. See to what He has descended! What therefore having done, shall we have accomplished our whole duty? We shall never in any wise do it; but to whatever degree of humility we have come, the greater part of it is still left behind. For consider, whatever you doest, you do to a fellow-servant, but your Master has done it to your servants. Hear and shudder! Never be elated at your humility!

Perhaps you laugh at the expression, as if humility could puff up. But be not surprised at it, it puffs up, when it is not genuine. How, and in what manner? When it is practiced to gain the favor of men, and not of God, that we may be praised, and be high-minded. For this also is diabolical. For as many are vainglorious on account of their not being vainglorious, so are they elated on account of their humbling themselves, by reason of their being high-minded. For instance, a brother has come, or even a servant you have received him, you have washed his feet; immediately you think highly of yourself. I have done, you say, what no other has done. I have achieved humility. How then may any one continue in humility? If he remembers the command of Christ, which says, "When you shall have done all things, say, We are unprofitable servants." [Luke 17:10] And again the Teacher of the world, saying, "I count not myself to have apprehended." [Philippians 3:13] He who has persuaded himself that he has done no great thing, however many things he may have done, he alone can be humble-minded, he who thinks that he has not reached perfection.

Many are elated on account of their humility; but let not us be so affected. Have you done any act of humility? Be not proud of it, otherwise all the merit of it is lost. Such was the Pharisee, he was puffed up because he gave his tythes to the poor, and he lost all the merit of it. [Luke 18:12] But not so the publican. Hear Paul again saying, "I know nothing by myself, yet am I not hereby justified." [1 Corinthians 4:4] Do you see that he does not exalt himself, but by every means abases and humbles himself, and that too when he had arrived at the very summit. And the Three Children were in the fire, and in the midst of the furnace, and what said they? "We have sinned and committed iniquity with our fathers." [Song of Songs 5:6, in the Septuagint; Daniel 3:29-30; 5:16] This it is to have a contrite heart; on this account they could say, "Nevertheless in a contrite heart and a humble spirit let us be accepted." Thus even after they had fallen into the furnace they were exceedingly humbled, even more so than they were before. For when they saw the miracle that was wrought, thinking themselves unworthy of that deliverance, they were brought lower in humility. For when we are persuaded that we have received great benefits beyond our desert, then we are particularly grieved. And yet what benefit had they received beyond their desert? They had given themselves up to the furnace; they had been taken captive for the sins of others; for they were still young; and they murmured not, nor were indignant, nor did they say, What good is it to us that we serve God, or what advantage have we in worshiping Him? This man is impious, and has become our lord. We are punished with the idolatrous by an idolatrous king. We have been led into captivity. We are deprived of our country, our freedom, all our paternal goods, we have become prisoners and slaves, we are enslaved to a barbarous king. None of these things did they say. But what? "We have sinned and committed iniquity." And not for themselves but for others they offer prayers. Because, say they, "You have delivered us to a hateful and a wicked king." Again, Daniel, being a second time cast into the pit, said, "For God has remembered me." Wherefore should He not remember you, O Daniel, when you glorified Him before the king, saying, "Not for any wisdom that I have"? [Daniel 2:30] But when you were cast into the den of lions, because thou did not obey that most wicked decree, wherefore should He not remember you? For this very reason surely should He. Were you not cast into it on His account? "Yea truly," he says, "but I am a debtor for many things." And if he said such things after having displayed so great virtue, what should we say after this? But hear what David says, "If He thus say, I have no delight in you, behold here am I, let Him do to me as seems good unto Him." [2 Samuel 15:26] And yet he had an infinite number of good things to speak of. And Eli also says, "It is the Lord: let Him do what seems Him good." [1 Samuel 3:18]

This is the part of well-disposed servants, not only in His mercies, but in His corrections, and in punishments wholly to submit to Him. For how is it not absurd, if we bear with masters beating their servants, knowing that they will spare them, because they are their own; and yet suppose that God in punishing will not spare? This also Paul has intimated, saying, "Whether we live or die, we are the Lord's." [Romans 14:8] A man, we say, wishes not his property to be diminished, he knows how he punishes, he is punishing his own servants. But surely no one of us spares more than He Who brought us into being out of nothing, Who makes the sun to rise, Who causes rain; Who breathed our life into us, Who gave His own Son for us.

But as I said before, and on which account I have said all that I have said, let us be humble-minded as we ought, let us be moderate as we ought. Let it not be to us an occasion of being puffed up. Are you humble, and humbler than all men? Be not high-minded on that account, neither reproach others, lest you lose your boast. For this very cause you are humble, that you may be delivered from the madness of pride; if therefore through your humility you fall into that madness, it were better for you not to be humble. For hear Paul saying, "Sin works death in me by that which is good, that sin by the commandment might become exceeding sinful." [Romans 7:13] When it enters into your thought to admire yourself because you are humble, consider your Master, to what He descended, and you will no longer admire yourself, nor praise yourself, but will deride yourself as having done nothing. Consider yourself altogether to be a debtor. Whatever you have done, remember that parable, "Which of you having a servant...will say unto him, when he has come in, Sit down to meat?...I say unto you, Nay...but stay and serve me." [From Luke 17:7-8] Do we return thanks to our servants, for waiting upon us? By no means. Yet God is thankful to us, who serve not Him, but do that which is expedient for ourselves.

But let not us be so affected, as if He owed us thanks, that He may owe us the more, but as if we were discharging a debt. For the matter truly is a debt, and all that we do is of debt. For if when we purchase slaves with our money, we wish them to live altogether for us, and whatever they have to have it for ourselves, how much more must it be so with Him, who brought us out of nothing into being, who after this bought us with His precious Blood, who paid down such a price for us as no one would endure to pay for his own son, who shed His own Blood for us? If therefore we had ten thousand souls, and should lay them all down for Him, should we make Him an equal return? By no means. And why? Because He did this, owing us nothing, but the whole was a matter of grace. But we henceforth are debtors: and being God Himself, He became a servant, and not being subject to death, subjected Himself to death in the flesh. We, if we do not lay down our lives for Him, by the law of nature must certainly lay them down, and a little later shall be separated from it, however unwillingly. So also in the case of riches, if we do not bestow them for His sake, we shall render them up from necessity at our end. So it is also with humility. Although we are not humble for His sake, we shall be made humble by tribulations, by calamities, by over-ruling powers. Do you see therefore how great is the grace! He has not said, "What great things do the Martyrs do? Although they die not for Me, they certainly will die." But He owns Himself much indebted to them, because they voluntarily resign that which in the course of nature they were about to resign shortly against their will. He has not said, "What great thing do they, who give away their riches? Even against their will they will have to surrender them." But He owns Himself much indebted to them too, and is not ashamed to confess before all that He, the Master, is nourished by His slaves.

For this also is the glory of a Master, to have grateful slaves. And this is the glory of a Master, that He should thus love His slaves. And this is the glory of a Master, to claim for His own what is theirs. And this is the glory of a Master, not to be ashamed to confess them before all. Let us therefore be stricken with awe at this so great love of Christ. Let us be inflamed with this love-potion. Though a man be low and mean, yet if we hear that he loves us, we are above all things warmed with love towards him, and honor him exceedingly. And do we then love? And when our Master loves us so much, we are not excited? Let us not, I beseech you, let us not be so indifferent with regard to the salvation of our souls, but let us love Him according to our power, and let us spend all upon His love, our life, our riches, our glory, everything, with delight, with joy, with alacrity, not as rendering anything to Him, but to ourselves. For such is the law of those who love. They think that they are receiving favors, when they are suffering wrong for the sake of their beloved. Therefore let us be so affected towards our Lord, that we also may partake of the good things to come in Christ Jesus our Lord.

[AD 407] John Chrysostom on Philemon 1:15
Paul wisely said “perhaps,” that the master may yield to his request. For since Onesimus’s flight arose from wickedness and a corrupt mind and not from the intention to accomplish good, Paul has said, “perhaps.” And he has not said, “therefore he fled,” but “therefore he was separated,” in order to elicit some tenderness on the part of Philemon.

[AD 420] Jerome on Philemon 1:15-16
Perhaps for this reason he departed from you for a time, so that you might receive him forever. No longer as a servant, but more than a servant, a beloved brother, especially to me: but how much more to you both in the flesh, and in the Lord." Sometimes, evil is the cause of good things, and God can turn the wicked intentions of men to good. What I am saying will become clearer through an example. Joseph's brothers, incited by jealousy, sold him to the Ishmaelites for twenty pieces of silver (Gen. 37). From this evil beginning, good things came to his father, his brothers, and all of Egypt. Finally, he said to his brothers: "You thought evil of me: but God turned it into good." (Gen. 45:8). We can understand a similar thing in the case of Onesimus, that bad beginnings were the occasion of a good thing. For if he had not fled his master, he would never have come to Rome where Paul was imprisoned. If he had not seen Paul in chains, he would not have received faith in Christ. If he had not had faith in Christ, he would never have been sent out for the work of the gospel as Paul's son. Thus little by little, and by its own steps, with changing judgments, Onesimus became a minister of the gospel, because he had fled from his master. And with a beautiful addition, he tempered his judgment, saying, "perhaps." The judgments of God are hidden, and it is reckless to pronounce as certain what is doubtful. "Perhaps," he said, "this happened": cautiously, timidly, tremblingly, without taking a firm stand: as if he had not said "perhaps," all the slaves would have fled, and become as apostates. But what he added, "for an hour," we must take for a time. For in comparison with eternity, all time is brief. "That you might receive him as if he were eternal." No eternal lord has a servant: for his power, and the condition of each, ends in death. But Onesimus, who has become eternally so through the faith of Christ, was eternal to Philemon, because he too had believed in Christ, and had received the spirit of liberty, so that he no longer was a slave, but had begun to be a brother from a slave, a most dear brother, an eternal brother; eternal to his Apostle and Lord also, to whom Onesimus had been subject as long as he was in the flesh, but afterwards united by the spirit. And thus we may understand that a servant who has believed in Christ is bound by a twofold law to two masters, so that he may be united to them by the necessity of the flesh for a time, and by the spirit in eternity.

[AD 420] Jerome on Philemon 1:15
Sometimes the occasion of evil becomes the occasion of good, and God turns evil human plans to an upright end.… If indeed [Onesimus] had not fled his master, he never would have come to Rome where Paul was in prison in chains. If he had not seen Paul in chains, he would not have received faith in Christ. If he had not had faith in Christ, he never would have become Paul’s son, so that he might be sent for the work of the gospel.… Paul says “perhaps” cautiously, hesitantly, with trepidation and not with certainty. If he had not said “perhaps,” all slaves would need to flee in order to become apostles.

[AD 428] Theodore of Mopsuestia on Philemon 1:15
Clearly Onesimus’s flight has served to reverse the wickedness of his judgment. The “perhaps,” however, makes Paul more persuasive [i.e., Paul puts this thought forward as a consideration for Philemon].

[AD 458] Theodoret of Cyrus on Philemon 1:15
Onesimus’s flight has become the source of good things to him.

[AD 1274] Thomas Aquinas on Philemon 1:15
Then when he says, Perhaps, indeed..., he gives the reason why he ought to receive him kindly, first, on the side of God, second, on the side of the Apostle: