Expositor's Bible Commentary Commentary Galatians 2:7

"but contrariwise, when they saw that I had been intrusted with the gospel of the uncircumcision, even as Peter with [the gospel] of the circumcision" — Galatians 2:7 (ASV)

The phrase “they saw” implies a change of mind by the Twelve as a result of Paul and Barnabas’s having reported on all that God had done through them among the Gentiles (cf. Acts 15:4). At first they were skeptical and uncertain, but later they came to stand with Paul on the issue of circumcision (cf. NIV text note). And just as the Gospel is one Gospel, no matter to whom it is preached, so also the commissioning and enabling of those who preach it are one—the reason being that the one who commissioned and empowered both Peter and Paul is God.