For as many of you as have been baptized into Christ have put on Christ.
27. As many of you as have been baptized. The greater and loftier the privilege is of being the children of God, the farther is it removed from our senses, and the more difficult to obtain belief. He therefore explains, in a few words, what is implied in our being united, or rather, made one with the Son of God; so as to remove all...
The law was given to convince men of sin and to restrain them from running into excess. It was never meant to overthrow the promise, but to serve it by directing sinners to Christ, the only way sin is expiated and pardoned.
AI summary
Commenting on Galatians 3:19-29
For as many of you as have been baptized into Christ,.... Not that it is to be imagined that these churches of Galatia, or any of the primitive churches, consisted of baptized and unbaptized persons; for this would be acting contrary to the commission of Christ and the order of the Gospel: but this way of speaking supposes that there might be some of them...