Summary: In a world where men are perverting the Gospel in the name of "Religious Unity", let us find the strength to stand fast and preach Christ ALONE!
THE COURSE OF THE GALATIANS (Vv. 6-7)
"I marvel that you are turning away so soon..."
I think it is safe to say that at least, part of the Galatian Christians were believers (v. 9), but they were being led astray by false teachers; We read in (Acts 18:23-28) that Paul had preached the Gospel to them and that they had believed, he also told them to beware of the false teachers that would come unto them; and that it had only been a short time since then. Although Paul is astonished and heartbroken, he has full confidence that those whom God has saved will come back to their right minds (5:10) "I have confidence in you, in the Lord, that you will have no other mind; but he who troubles you shall bear his judgment, whoever he is." Although it is possible for a child of God to turn away for a season, it is never possible for them to be turned away totally from the one who saved him by His grace. If salvation is truly a work of God, then how can man overthrow it? (Isa. 14:27) " For the Lord of hosts has purposed, And who will annul it? His hand is stretched out, And who will turn it back?" It is not possible for a believer, though he be deceived for a season, to be separated from the love of God in Christ. (Rom. 8:38-39). "For I am persuaded that neither death nor life, nor angels nor principalities nor powers, nor things present nor things to come, nor height nor depth, nor any other created thing, shall be able to separate us from the love of God which is in Christ Jesus our Lord."
"Turning away... From Him who called you in the grace of Christ..."
They were turning to a gospel which seeks justification by obedience to the law rather than by the righteousness which comes from God by faith in Christ. It seeks to save by adding to the one true gospel such items as: circumcision and the keeping of the law, of the Jewish feasts and holidays, and of the observing of the traditions of men. This is what Paul means when he said that they had fallen from grace in (5:4) "You have become estranged from Christ, you who attempt to be justified by law; you have fallen from grace." They had fell (turned) from trusting in justifiction by grace to justification by works.
"To a different gospel... Which is not another..." (Eph. 4:4-6) "There is one body and one Spirit, just as you were called in one hope of your calling; one Lord, one faith, one baptism; one God and Father of all, who is above all, and through all, and in you all." There is only one Gospel and no matter how many other false beliefs arise, it will always be the "Good news" from God to man. Anything other than God’s free grace to man is not "Good news"
"But there are some who want to pervert the gospel..." (Acts 20:29) "For I know this, that after my departure savage wolves will come in among you, not sparing the flock." It is imperative that every preacher/teacher of the Word, be on the look out for any type of false doctrine/prophet within the congregation. All who purposely aim to pervert the gospel will be utterly condemned; as we will see in our next two verses.