What does Galatians 2:2 mean?
Paul is recalling a trip to Jerusalem which may have occurred around AD 45. He traveled there from Antioch in Syria with Barnabas, a Jewish Christian, and Titus, a Gentile Christian. He mentions that he went to Jerusalem because of a revelation. This could refer to the revelation given to a prophet named Agabus that there would be a great famine all over the world (Acts 11:27–28). Paul and Barnabas were sent to bring famine relief to the Christians in and around Judea.While in Jerusalem, Paul decided to approach the leaders of the church there in private. He explained to them the gospel of Jesus that he had been preaching to Gentiles—to non-Jewish people. This was the very gospel Paul had preached to the Galatians, indicating that Christ's death on the cross was entirely sufficient to forgive our sins. We are forgiven by trusting in God's grace to us through Jesus' substitution in our place. In other words, the Gentiles need not follow the law of Moses in order to be saved.
Paul, it seems, wanted to make sure he was not running the race in vain. For Paul, "running the race" was a metaphor about doing his best to fulfill the mission God had given him. It's not that Paul doubted his message to the Gentiles. It appears that he was concerned about being divided from the other 12 apostles if his message about Christ was not the same as theirs. In other words, would Christ's disciples also be Judaizers, leaving Paul on his own preaching the true gospel of Jesus?