If God didn't want Paul's teachings in the Bible, they wouldn't be there. God is plenty powerful enough to have keep falsehoods out of it. The Holy Spirit led those who assembled the Bible to include them. I won't naysay the Spirit.
Or perhaps they served the purposes of the men assembling the cannon...
That's an easy accusation to make, but I've never seen anyone detail exactly what the specifics are.
Vast majority of canon was settled on by the second century of Our Lord and the last few by the fourth century. The whys and wherefores are well-documented and available to those interested. In short, what became the canon were the works shared amongst the early church fathers and met standards of contemporaneity and doctrine in line with the earliest works.
