I know from time to time I tend to go over this verse, but I believe it's time to fully understand what's being said here. Paul, in addressing the people at Galatia, talks to them as to why we ought, as people of Jesus the Messiah ought to be united. At the time of his authorship of Galatians the people there were falling into their former ways, and why Paul said to them, "I marvel that you are turning away so soon from Him who called you in the grace of Christ, to a different gospel, which is not another; but there are some who trouble you and want to pervert the gospel of Christ. 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. 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" (Galatians 1:6-9, New King James).