Very good.
Paul is one of the two greatest Apostles and a great and far reaching source of doctrinal beliefs. But he is not God. There are many here who think that he is, and want to move Jesus and the Gospels to the background. How many times have we been told about the Gospel of Paul and how that is what we ought to believe, right here on FR by many of your comrades?
Peter had no problem saying what Paul wrote was hard to understand, maybe that's why some would object to referring to his words as definitive. But are his writings LESS God's word than Luke's or John's or any other writer? I think not.
I don't understand how the Gospels would be “moved to the back” when they and Paul's writings are equally part of Scripture. How? By quoting Paul? By saying he teaches something different than what is spoken in the Gospels?
Or....What? Ought NOT we believe what Paul wrote?
(Please don't try to choose my “comrades” for me, I agree with whom I agree and disagree with whom I disagree.)