Galatians 1:8-10

But though we, or an angel from heaven, should preach unto you any gospel other than that which we preached unto you, let him be anathema. As we have said before, so say I now again, If any man preacheth unto you any gospel other than that which ye received, let him be anathema. For am I now seeking the favor of men, or of God? or am I striving to please men? if I were still pleasing men, I should not be a servant of Christ.