Then after fourteen years I went up again to Jerusalem with Barnabas, taking Titus along with me. I went up because of a revelation and set before them (though privately before those who seemed influential) the gospel that I proclaim among the Gentiles, in order to make sure I was not running or had not run in vain. – Galatians 2:1-2 ESV
Paul has a sometimes deserved reputation as a firebrand, for reasons that this very letter to the Galatians will demonstrate in a bit, but I love the humility in this passage. Paul heads back to Jerusalem with his friends (and encouragers) Barnabas and Titus for the purpose of getting his preaching and theology checked out by the other apostles. You sense a real readiness to change or adjust if he finds he has not been delivering the correct message. A spirit of respect and deference shines through in his desire to meet privately with those who were influential.
Paul knows it isn’t about him. It is about getting the message of Jesus right.