Discerning True from False Teachings in Relation to God

Paul, an apostle not from human beings nor through a human being, but through Jesus Christ and God the Father who raised Him from the dead, and all the brothers who are with me, to the churches of Galatia: grace to you and peace from God our Father and the Lord Jesus Christ, who gave Himself for our sins that He might rescue us from the present evil age in accord with the will of our God and Father, to whom be glory forever and ever. Amen.

I am amazed that you are so quickly forsaking the one who called youby [the] grace [of Christ] for a different gospel (not that there is another). But there are some who are disturbing you and wish to pervert the gospel of Christ. But even if we or an angel from heaven should preach [to you] a gospel other than the one that we preached to you, let that one be accursed! As we have said before, and now I say again, if anyone preaches to you a gospel other than the one that you received, let that one be accursed!

Am I now currying favor with human beings or God? Or am I seeking to please people? If I were still trying to please people, I would not be a slave of Christ (Gal 1:1-10).