Why are Paul's writings in the Bible?
Paul's writings are in the Bible because he is not a liar; the Holy Spirit inspired him to write exactly what he wrote. As the master builder, Paul started with a new foundation, Jesus Christ crucified, buried, and risen again, which confirms his authority.
Les explains that Paul's writings are in the Bible because he is not a liar; if he were, his writings would have no business in the book. But they are there because the Holy Spirit inspired the man to write exactly what he wrote. Paul identifies himself as the master builder, who did not come to continue an existing building but started with a brand new foundation: Jesus Christ and Him crucified, buried, and risen again. As Paul says, no other foundation can any man lay than that which is laid, which is Jesus Christ. This confirms the authority and place of his writings.
According to the grace of God which is given unto me, as a wise masterbuilder, I have laid the foundation, and another buildeth thereon. But let every man take heed how he buildeth thereupon.