Galatians 1:6-12 (NKJV)
⁶  I marvel that you are turning away so soon from Him who called you in the grace of Christ, to a different gospel,
⁷  which is not another; 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, preach any other gospel to you than what we have preached to you, let him be accursed.
⁹  As we have said before, so now I say again, if anyone preaches any other gospel to you than what you have received, let him be accursed.
¹⁰  For do I now persuade men, or God? Or do I seek to please men? For if I still pleased men, I would not be a bondservant of Christ.
¹¹  But I make known to you, brethren, that the gospel which was preached by me is not according to man.
¹²  For I neither received it from man, nor was I taught it, but it came through the revelation of Jesus Christ.