2 Peter 3:15-16
Peter on Paul's Letters
15 Bear in mind that our Lord’s patience means salvation, just as our dear brother Paul also wrote you with the wisdom that God gave him. 16 He writes the same way in all his letters, speaking in them of these matters. His letters contain some things that are hard to understand, which ignorant and unstable people distort, as they do the other Scriptures, to their own destruction.
If you ever have a hard time understanding some of the Scriptures, you are not alone...St. Peter, wrote that his friend St. Paul wrote with the wisdom that God gave him....Even St. Paul's letters contained things that the layman could not understand...The people reading Paul's letters were not reading (or listening to) the Old Testament written a thousand years ago...So even though St. Paul was writing about Jesus, and it was right after His death, what he wrote about contained information and was written in a way people were having trouble understanding his epistles...