How much more, therefore, ought men not to claim the credit for themselves if they perform any good work, when the very Son of God in the Gospel said that he sought not his own glory. Nor had he come to do his own will but the will of him who sent him! This will and glory of the Father the apostle now commemorates, that he also, by the example of the Lord who sent him, may indicate that he seeks not his own glory or the performance of his own will in the preaching of the gospel, just as he says a little later, “if I were to please men, I should not be a servant of Christ.”
This too is new and unusual, for we never find the word, Amen placed at the beginning of an Epistle, but a good way on; here, however he has it in his beginning, to show that what he had already said contained a sufficient charge against the Galatians, and that his argument was complete, for a manifest offense does not require an elaborate crimination. Having spoken of the Cross, and Resurrection, of redemption from sin and security for the future, of the purpose of the Father, and the will of the Son, of grace and peace and His whole gift, he concludes with an ascription of praise.
Another reason for it is the exceeding astonishment into which he was thrown by the magnitude of the gift, the superabundance of the grace, the consideration who we were, and what God had wrought, and that at once and in a single moment of time. Unable to express this in words, he breaks out into a doxology, sending up for the whole world an eulogium, not indeed worthy of the subject, but such as was pos...
We nowhere find the word amen placed at the beginning or in the prologue of his letters but after many words. But here, showing that what he has said is a sufficient accusation of the Galatians and that the argument is closed, he made this the prologue. For it does not take long to establish charges that are patently true…. But not only for this reason does he do it but because he is exceedingly astonished by the magnitude of the gift, the excess of grace and what God did at once in a tiny space of time for those in such a state. Unable to express this in words, Paul breaks into a doxology. He holds up for the whole world a blessing, not indeed worthy of the subject but such as was possible to him.