The apostle is still carrying on the same design as in the foregoing verse, which was, to convince the Galatians of their sin and folly in departing from the truth of the gospel: having just before been expostulating with them about the change of their behaviour towards him who endeavoured to establish them in it, he here gives them the character of those false teachers who made it their business to draw them away from it, which if they would attend to, they might soon see how little reason they had to hearken to them: whatever opinion they might have of them, he tells them they were designing men, who were aiming to set up themselves, and who, under their specious pretences, were more consulting their own interest than theirs: "They zealously affect you," says he; "they show a mighty respect for you, and pretend a great deal of affection to you, but not well; they do it not with any good design, they are not sincere and upright in it, for they would exclude you, that you might affect them. That which they are chiefly aiming at is to engage your affections to them; and, in order to this, they are doing all they can to draw off your affections from me and from the truth, that so they may engross you to themselves." This, he assures them, was their design, and therefore they must needs be very unwise in hearkening to them. Note, 1. There may appear to be a great deal of zeal where yet there is but little truth and sincerity. 2. It is the usual way of seducers to insinuate themselves into people's affections, and by that means to draw them into their opinions. 3. Whatever pretences such may make, they have usually more regard to their own interest than that of others, and will not stick at ruining the reputation of others, if by that means they can raise their own. On this occasion the apostle gives us that excellent rule which we have, Gal 4:18, It is good to be zealously affected always in a good thing. What our translation renders in a good man, and so consider the apostle as pointing to himself; this sense, they think, is favoured both by the preceding context and also by the words immediately following, and not only when I am present with you, which may be as if he had said, "Time was when you were zealously affected towards me; you once took me for a good man, and have now no reason to think otherwise of me; surely then it would become you to show the same regard to me, now that I am absent from you, which you did when I was present with you." But, if we adhere to our own translation, the apostle here furnishes us with a very good rule to direct and regulate us in the exercise of our zeal: there are two things which to this purpose he more especially recommends to us: - (1.) That it be exercised only upon that which is good; for zeal is then only good when it is in a good thing: those who are zealously affected to that which is evil will thereby only to do so much the more hurt. And, (2.) That herein it be constant and steady: it is good to be zealous always in a good thing; not for a time only, or now and then, like the heat of an ague-fit, but, like the natural heat of the body, constant. Happy would it be for the church of Christ if this rule were better observed among Christians!

It is good to be zealously affected - It is well to have a determined mind and an ardent heart in reference to things which are laudable and good.

Not only when I am present - You were thus attached to me when I was among you, but now ye have lost both your reverence and affection for me. Your false teachers pretended great concern for you, that you might put all your confidence in them; they have gained their end; they have estranged you from me, and got you to renounce the Gospel, and have brought you again into your former bondage.

My little children,.... A soft and tender way of speaking, used by Christ to his disciples, and frequently by that affectionate and beloved disciple, John. It is expressive of the apostle's strong love and affection for them, and points out their tenderness in the faith, and that small degree of spiritual light and knowledge they had, as well as signifies that he had been, as he hoped, and in a judgment of charity believed, an instrument of their conversion, and was their spiritual parent: hence it follows,

of whom I travail in birth again; he compares himself to a woman with child, as the church in bringing forth souls to Christ sometimes is; and all his pains and labours in the ministry of the word to the sorrows of a woman during the time of childbearing, and at the birth. When he first came among them, he laboured exceedingly; he preached the Gospel in season, and out of season; he followed his indefatigable endeavours with importunate prayers; and his ministry among them was attended with much weakness of body, and with many reproaches, afflictions, and persecutions, comparable to the birth throes of a woman in travail: however, as he hoped he was the means of their being born again, of the turning of them from Heathenism to Christianity, and from serving idols to serve the living God, and believe in his Son Jesus Christ; but the false apostles coming among them had so strangely wrought upon them, and they were so much gone back and degenerated, that they seemed to be like so many abortions, or as an unformed foetus; wherefore he laboured again with all his might and main, by writing to them, using arguments with them, sometimes giving them good words, at other times rough ones, and fervently praying for them, if possible, to recover them from Judaism, to which they were inclined, to the pure Gospel of Christ.

Until Christ be formed in you; which is the same as to be created in Christ, to be made new creatures, or new men in him; or, in other words, to have the principle of grace wrought in the soul, which goes by the name of Christ formed in the heart; because it is from him, he is the author of it, and it bears a resemblance to him, and is that by which he lives, dwells, and reigns in the souls of his people. Now though, as he hoped, this new man, new creature, or Christ, was formed in them before, when he first preached the Gospel to them; yet it was not a perfect man; particularly their knowledge of Christ, of his Gospel, and Gospel liberty, was far from being so, in which they went backwards instead of forwards; and therefore he was greatly concerned, laboured exceedingly, and vehemently endeavoured, which he calls travailing in birth again, to bring them to the unity of the faith, and of the knowledge of the Son of God unto a perfect man, unto the measure of the stature of the fulness of Christ. It is also the same as to be conformed to the image of Christ, which in regeneration is stamped upon the saints, and is gradually increased, and will be perfected in heaven; and that this might more manifestly appear, over which a veil was drawn, by their departure in any degree from the truths of the Gospel, was what he earnestly sought after: once more, it is the same as to have the form of Christ; that is, of the Gospel of Christ upon them, or to be cast into the form of doctrine, and mould of the Gospel, and to receive a Gospel impression and spirit from it; which is to have a spirit of liberty, in opposition to legal bondage; to live by faith on Christ, and not on the works of the law; to derive comfort alone from him, and not from any services and duties whatever; to have repentance, and the whole course of obedience, influenced by the grace of God, and love of Christ; and to be zealous of good works, and yet have no dependence on them for justification and salvation. This is what the apostle so earnestly desired, when, instead of it, these Galatians seemed to have the form of Moses, and of the law.

good to be zealously affected--rather, to correspond to "zealously court" in Gal 4:18, "to be zealously courted." I do not find fault with them for zealously courting you, nor with you for being zealously courted: provided it be "in a good cause" (translate so), "it is a good thing" (Co1 9:20-23). My reason for saying the "not well" (Gal 4:17; the Greek is the same as that for "good," and "in a good cause," in Gal 4:28), is that their zealous courting of you is not in a good cause. The older interpreters, however, support English Version (compare Gal 1:14).

always--Translate and arrange the words thus, "At all times, and not only when I am present with you." I do not desire that I exclusively should have the privilege of zealously courting you. Others may do so in my absence with my full approval, if only it be in a good cause, and if Christ be faithfully preached (Phi 1:15-18).