Is everything Paul wrote inspired by the Holy Spirit?
Yes. Scripture teaches that every word Paul wrote is inspired by the Holy Spirit. Even when his words sound like his own thinking or thoughts, they are not; they are inspired of the Spirit. Paul received his gospel and teaching by revelation, not from man, nor was he taught it by the Twelve or any scholar.
Les explains that in Galatians 1:11-12, Paul by inspiration makes clear that every word he writes is inspired by the Holy Spirit. Although it may sound like Paul's own thinking or thoughts, it is not; it is inspired of the Spirit. Paul certifies that the gospel he preached was not after man. He did not learn it in a school or seminary. He neither received it of man nor was taught it, but by instruction—by revelation. Les stresses that Paul separated himself from the twelve apostles throughout Galatians 1 and 2 because he wasn't taught by them or any great scholar. Everything Paul laid down in his preaching, teaching, and writing he received by revelation. Even though the Lord had ascended back to glory, Paul saw Christ face to face.
But I certify you, brethren, that the gospel which was preached of me is not after man.