Discerning Priests from Anti-priests in Our Times

I wonder that you are so soon removed from Him who called you into the grace of Christ, unto another gospel. Which is not another: only there are some that trouble you and would pervert the gospel of Christ. But though we, or an angel from heaven, preach a gospel to you besides that which we have preached to you, let him be anathema. As we said before, so now I say again: If anyone preach to you a gospel besides that which you have received, let him be anathema! For do I now persuade men or God? Or do I seek to please men? If I yet pleased men, I should not be the servant of Christ (Gal 1:6-10).