Galatians 4:17-20

Verse 17

They zealously affect you, but not well - It is difficult for common readers to understand the meaning of these words: perhaps it would be better to translate Ζηλουσιν ὑμας ου καλως, these false teachers endeavor to conciliate your esteem, but not in honest or true principles; they work themselves into your good graces; they wish you to place all your affection upon themselves.

They would exclude you - They wish to shut you out from the affection of your apostle, that you might affect them, ἱνα αυτους ζηλουτε, that you might love them alone, hear them alone, abide by their directions only, and totally abandon him who called you into the grace of the Gospel of Christ. Some MSS. read ἡμας, us, instead of ὑμας, you; they wish to shut us entirely out from among you, that you may receive and believe them alone. The sense is nearly the same but the former appears to be the more authentic reading.
Verse 18

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.
Verse 19

My little children - Τεκνια μου· My beloved children. As their conversion to God had been the fruit of much labor, prayers, and tears, so he felt them as his children, and peculiarly dear to him, because he had been the means of bringing them to the knowledge of the truth; therefore he represents himself as suffering the same anxiety and distress which he endured at first when he preached the Gospel to them, when their conversion to Christianity was a matter of great doubt and uncertainty. The metaphor which he uses needs no explanation.

Until Christ be formed in you - Till you once more receive the Spirit and unction of Christ in your hearts, from which you are fallen, by your rejection of the spirit of the Gospel.
Verse 20

I desire to be present with you - I wish to accommodate my doctrine to your state; I know not whether you need stronger reprehension, or to be dealt with more leniently.

I stand in doubt of you - I have doubts concerning your state; the progress of error and conviction among you, which I cannot fully know without being among you, This appears to be the apostle's meaning, and tends much to soften and render palatable the severity of his reproofs.
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