Galatians 1:8-10

But even if we (or an angel from heaven) should preach a gospel contrary to the one we preached to you, let him be condemned to hell! As we have said before, and now I say again, if any one is preaching to you a gospel contrary to what you received, let him be condemned to hell! Am I now trying to gain the approval of people, or of God? Or am I trying to please people? If I were still trying to please people, I would not be a slave of Christ!