Galatians 1:8-10

But even if we or an angel from heaven should preach to you a gospel that is different from the one we preached to you, may he be condemned to hell! We have said it before, and now I say it again: if anyone preaches to you a gospel that is different from the one you accepted, may he be condemned to hell! Does this sound as if I am trying to win human approval? No indeed! What I want is God's approval! Am I trying to be popular with people? If I were still trying to do so, I would not be a servant of Christ.