Galatians 1:6-10 RSV

6 I am astonished that you are so quickly deserting him who called you in the grace of Christ and turning to a different gospel--
7 not that there is another gospel, but there are some who trouble you and want to pervert the gospel of Christ.
8 But even if we, or an angel from heaven, should preach to you a gospel contrary to that which we preached to you, let him be accursed.
9 As we have said before, so now I say again, If any one is preaching to you a gospel contrary to that which you received, let him be accursed.
10 Am I now seeking the favor of men, or of God? Or am I trying to please men? If I were still pleasing men, I should not be a servant of Christ.