Gal 1:12

“It was very shrewd of him to mention revelation, for the Lord Jesus had been taken up and was no longer seen equally of all. But to Paul he had appeared on the road and made him worthy of the ministry of proclamation. And this again he sets against their slanders, showing that in this too he did not fall short of the apostles. For just as the Galatians received the gospel from him, so likewise he had Christ himself as a teacher.”

“Do you see how he constantly affirms that he became God's disciple, in contrast to the claim of those who imposed the circumcision upon the Galatians, arguing that those who become disciples of Christ, i.e. Peter and James and John, permit the circumcision, whereas he is a disciple of the disciples and, therefore, they should not pay attention to them rather than to him?”

“That is why he adds, "For neither did I receive it of man; nor did I learn it but by the revelation of Jesus Christ," whereby he precludes two ways of receiving. First, that he did not receive from man the authority to preach. As to this he says, "nor of man," i.e., purely man, "did I receive it," i.e., the authority to preach the Gospel, but of Christ: "And how shall they preach unless they be sent?" (Rom 10:15); "I have given thee for a light of the Gentiles, for a covenant of the people" (Is 42:6); "This man is to me a vessel of election, to carry my name before the Gentiles and kings and the children of Israel" (Acts 9:15). Secondly, that he did not receive the science of the Gospel from man. Hence he says, "nor did I learn it," namely, the Gospel, from mere man, "but by the revelation of Jesus Christ," i.e., by Jesus Christ showing everything clearly. "But to us, God hath revealed them" (1 Cor 2:10); "The Lord hath opened my ear, and I do not resist" (Is 50:5), and "The Lord has given me a learned tongue, that I should know how to uphold by word him that is weary" (Is 50:4). Now this revelation was made to the Apostle when he was rapt into paradise, where "he heard secret words which it is not granted to man to utter" (2 Cor 12:4).”