6I am astonished that you are so quickly deserting him who called you in the grace of Christ and are turning to a different gospel- 7 not that there is another one, but there are some who trouble you and want to distort the gospel of Christ. 8But even if we or an angel from heaven should preach to you a gospel contrary to the one we preached to you, let him be accursed. 9As we have said before, so now I say again: If anyone is preaching to you a gospel contrary to the one you received, let him be accursed.
Paul expresses surprise that the Galatians have deserted essential elements of the Gospel so quickly. He is very clear here. To change the Gospel that they had heard and received, is to desert Christ.
Many people who do not hold to the Gospel as it is given to us in the New Testament Scriptures nevertheless maintain that they are faithful to Christ. They claim to hold to His ethics, believe in following His good example, hear His teachings etc. but they do not believe the Gospel of grace alone through faith alone in Christ alone. Paul says here that such a claim is impossible.
You cannot be following Christ if the Gospel you believe is not the Gospel taught in the New Testament. To add or detract anything from the Gospel is to abandon Jesus Christ. If you are finding the Gospel as it is presented in the Bible too difficult to swallow, do not forget that to forsake it is to forsake Jesus. Have a biblical Gospel.
Do not have the delusion that you can follow Jesus and not follow His Gospel message. And do not change the message He preached in order to make it more palatable for you. Such self deception will end up in eternal ruin for you and anyone who believes what you say.
The Gospel that Paul is so careful to defend is that we are saved by grace alone, through faith alone in Christ alone. This means that no amount of rule keeping contributes to our salvation. No baptism, confirmation, law or use of a gift is a necessary element in saving us from our sins.
Seek out the true Gospel. Know it, believe it, defend it and give it. It will cost you, but the cost of adding to it is far worse.