How do you KNOW? Paul himself warns his congregations at several different times to beware of false writings attributed to him. How do you know that what we have is Paul's writings?
The reason, of course, is that we trust the Church who has handed it down to us. Otherwise, how do you go about disproving such nutty claims that the Da Vinci Code is more correct? In the end, we call the Scriptures the Word of God because we believe that the Church has preserved just that - God's Word.
Regards
If the Church has verified that it has in its hands the words of an Apostle, then it is subject to those words.
The same as the cryogenic experiment....once they verify it is the Apostle Paul and bring him back to life, then they are subject to the words of the apostle.
Their job of verifying was valuable, but that doesn't give them the last word.