VERSES 18, 19. Then after three years I went up to Jerusalem to see Peter, and abode with him fifteen days. But other of the apostles saw I none, save James the Lord's brother. Paul minutely recounts his personal history to stop the cavil of the false apostles. Paul does not deny that he had been with some of the apostles. He went to Jerusalem uninvited, not to be instructed, but to visit with Peter. Luke reports the occasion in the ninth chapter of the Book of Acts. Barnabas introduced Paul to the apostles and related to them how Paul had met the Lord Jesus on the way to Damascus, also how Paul had preached boldly at Damascus in the name of Jesus. Paul says that he saw Peter and James, but he denies that he learned anything from them. Why does Paul harp on this seemingly unimportant fact? To convince the churches of Galatia that his Gospel was the true Word of Christ which he learned from Christ Himself and from no man. Paul was forced to affirm and re-affirm this fact. His usefulness to all the churches that had used him as their pastor and teacher was at stake.