John Calvin Commentary Galatians 1:24

"and they glorified God in me." — Galatians 1:24 (ASV)

And they glorified God in me. This was an evident proof that his ministry was approved by all the churches of Judea, and approved in such a manner that they broke out into admiration and praise of the wonderful power of God. Thus, he indirectly reproves their malice by showing that their venom and slanders could have no other effect than to hide the glory of God, which, as the apostles admitted and openly acknowledged, shone brightly in the apostleship of Paul.

This reminds us of the light in which we ought to regard the saints of the Lord. When we observe people adorned with God's gifts, such is our depravity, ingratitude, or proneness to superstition, that we worship them as gods, unmindful of Him by whom those gifts were bestowed. These words remind us, on the contrary, to lift up our eyes to the Great Author and to ascribe to Him what is His own, while they also inform us that an occasion for offering praise to God was provided by the change produced in Paul, from being an enemy to becoming a minister of Christ.