Was Paul's gospel revealed from the ascended Lord or from the twelve apostles?

Paul's gospel was revealed from the ascended Lord in glory, not from the twelve apostles. He did not receive it through contact with the twelve at Jerusalem. Later he went up by revelation to communicate that gospel, confirming it was not connected with Judaism or Christ's earthly ministry.

Les teaches that Paul had no contact with those twelve men at Jerusalem, so when Paul speaks of revelation he is always referring to what Christ revealed from His position in the heavenlies. In chapter 2, Paul goes up to Jerusalem to convince the twelve that his gospel to the Gentiles was not connected with Judaism. He went by revelation because God instructed him to go up and meet with the twelve, and he communicated the gospel he preached among the Gentiles. Les emphasizes that everything Paul received to pass on to the Roman world was revealed from the Ascended Lord in glory, not from the twelve and not from the earthly ministry of Christ.

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.

How did Paul communicate his gospel to the leadership in Jerusalem?

Paul communicated his gospel to the leadership in Jerusalem by sitting down with them and explaining it point by point, line upon line, rather than flippantly stating a belief. He carefully communicated the revelations given to him, which were above and beyond Judaism, so they could understand his position.