Why did Paul go up to Jerusalem in Galatians 2?
Paul went up to Jerusalem by revelation because God instructed him to go and communicate the gospel he preached among the Gentiles. His purpose was to convince the twelve men at Jerusalem that his gospel to the Gentiles was not connected with Judaism.
Les teaches that in Galatians 2 Paul went up to Jerusalem to convince the twelve that his gospel to the Gentiles was not connected with Judaism. Paul says he went up again by revelation, meaning God instructed him to go to Jerusalem. There he communicated the gospel he preached among the Gentiles. Les explains that everything Paul received to pass on to the Roman world was revealed from the Ascended Lord in glory—not from the twelve, not from the earthly ministry of Christ, but from the Ascended Lord.