Tha's one way to do it. The other way is to interpret Paul through the Gospels (which Christians believe are the living words of Chirst). Now, which is more important? Christ or Paul? Obviously, some think Paul.
So then Paul was lying when he wrote that the Gospel he preaches is the Gospel that he received from none other than Jesus Christ himself:
"I certify you, brethren, that the gospel which was preached of me is not after man. For I neither received it of man, neither was I taught it, but by the revelation of Jesus Christ."[Galatians 1:11-12]
So is Paul lying??? How come all the other apostles and disciples of his day don't feel the way that you do??? Were they all wrong too???