What did Jesus instruct Paul to do regarding the Jerusalem meeting?

The Lord Jesus Himself instructed Paul to go up to Jerusalem to attend a meeting with the twelve and the Jerusalem leaders. Paul went up by revelation, not by human direction, and communicated the gospel he preached among the Gentiles, as recorded in Galatians chapter 2.

Les explains that the Lord Jesus Himself instructed the apostle Paul to go up to Jerusalem to meet with the twelve and the Jerusalem leaders. Paul went up by revelation, meaning Christ led him, not flesh and blood. He communicated the gospel he preached among the Gentiles. Les points out that this gospel was totally different from what Peter and the eleven preached to the Jew, though it is the same God. The word 'communicated' means absolute clarity. This meeting occurred 14 years after Paul's conversion, and he took Barnabas and Titus with him.

Galatians 2:2

And I went up by revelation, and communicated unto them that gospel which I preach among the Gentiles, but privately to them which were of reputation, lest by any means I should run, or had run, in vain.

Why did the Lord tell Paul to go up to Jerusalem and confront the Twelve?

The Lord told Paul by revelation to go to Jerusalem and confront the Twelve so that the apostles could settle the debate over whether salvation requires keeping the Law of Moses and circumcision. Settling this was necessary for the gospel to move forward into the Gentile world without legalistic requirements.