"For God is my witness, how I long after you all in the tender mercies of Jesus Christ. And this I pray, that your love may abound yet more and more in knowledge and all discernment; that you may approve the things that are excellent; that you may be sincere and void of offense unto the day of Christ; being filled with the fruits of righteousness, which are through Jesus Christ, unto the glory and praise of God."
He calls not God to witness as though he should be doubted, but does this from his great affection, and his exceeding persuasion and confidence; for after saying that they had fellowship with him, he adds this also, "in the tender mercies of Christ," lest they should think that his longing for them was for this cause, and not simply for their own sake. And what mean these words, "in the tender mercies of Christ"? They stand for "according to Christ." Because you are believers, because ye love Christ, because of the love that is according to Christ. He does not say "love," but uses a still warmer expression, "the tender mercies of Christ," as though he had said, "having become as a father to you through the relationship which is in Christ." For this imparts to us bowels warm and glowing. For He gives such bowels to His true servants. "In these bowels," says He, as though one should say, "I love you with no natural bowels, but with warmer ones, namely, those of Christ." "How I long after you all." I long after all, since you are all of this nature; I am unable in words to represent to you my longing; it is therefore impossible to tell. For this cause I leave it to God, whose range is in the heart, to know this. Now had he been flattering them, he would not have called God to witness, for this cannot be done without peril.
"Wherefore I pray "says the apostle, "that your love may abound yet more and more, in knowledge and in all judgment, that ye may approve things that are excellent."
He wishes, with God’s assistance, to pour into them pure Christian doctrine, that their faith will be firm and that they will see clearly all the vast implications of their faith. He wants them to be able to distinguish what is useful from what is useless. He prays that they may adorn the teaching of the Lord with works of righteousness, producing the fruit of immortality to bring about an abundance of good things. This will be the glory of the apostle to the Gentiles.
"And this," says he, "I pray, that your love may abound yet more and more." For this is a good of which there is no satiety; for see, being so loved he wished to be loved still more, for he who loves the object of his love, is willing to stay at no point of love, for it is impossible there should be a measure of so noble a thing. Paul desires that the debt of love should always be owing; "Owe no man anything, save to love one another." [Romans 13:8] The measure of love is, to stop nowhere; "that your love," says he, "may abound yet more and more." Consider the character of the expression, "that it may abound yet more and more," he says, "in knowledge and all discernment." He does not extol friendship merely, nor love merely, but such as comes of knowledge; that is, You should not apply the same love to all: for this comes not of love, but from want of feeling. What means he by "in knowledge"? He means, with judgment, with reason, with discrimination. There are who love without reason, simply and any how, whence it comes that such friendships are weak. He says, "in knowledge and all discernment, that you may approve the things that are excellent," that is, the things that are profitable. This I say not for my own sake, says he, but for yours, for there is danger lest any one be spoiled by the love of the heretics; for all this he hints at, and see how he brings it in. Not for my own sake, says he, do I say this, but that you may be sincere, that is, that you receive no spurious doctrine under the pretence of love. How then, says he, "If it be possible, live peaceably with all men"? "Live peaceably" [Romans 12:18], he says, not, Love so as to be harmed by that friendship; for he says, "if your right eye causes you to stumble, pluck it out, and cast it from you; that you may be sincere" [Matthew 5:29], that is, before God, "and without offense," that is, before men, for many men's friendships are often a hurt to them. Even though it hurts you not, says he, still another may stumble thereat. "Unto the day of Christ"; i.e. that you may then be found pure, having caused no one to stumble.
There is no end to such love. Anyone who is loved so deeply, loved in this way, wishes to be loved all the more. There is no measure to love. One who loves and is loved in return does not wish that love to stop but to increase.
[AD 407] John Chrysostom on Philippians 1:8-11
He calls not God to witness as though he should be doubted, but does this from his great affection, and his exceeding persuasion and confidence; for after saying that they had fellowship with him, he adds this also, "in the tender mercies of Christ," lest they should think that his longing for them was for this cause, and not simply for their own sake. And what mean these words, "in the tender mercies of Christ"? They stand for "according to Christ." Because you are believers, because ye love Christ, because of the love that is according to Christ. He does not say "love," but uses a still warmer expression, "the tender mercies of Christ," as though he had said, "having become as a father to you through the relationship which is in Christ." For this imparts to us bowels warm and glowing. For He gives such bowels to His true servants. "In these bowels," says He, as though one should say, "I love you with no natural bowels, but with warmer ones, namely, those of Christ." "How I long after you all." I long after all, since you are all of this nature; I am unable in words to represent to you my longing; it is therefore impossible to tell. For this cause I leave it to God, whose range is in the heart, to know this. Now had he been flattering them, he would not have called God to witness, for this cannot be done without peril.