I am astonished that you are so quickly deserting him who called you in the grace of Christ and are turning to a different gospel— not that there is another one, but there are some who trouble you and want to distort the gospel of Christ.  But 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.  As 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.
(Galatians 1:6-9 ESV)
Well, here we go.
After a graceful greeting, Paul dives right into his rebuke of the Galatian churches. Paul is "astonished" that the church is deserting Jesus. Let's look at this carefully. From the context of the entirety of the book of Galatians, we never hear of the Galatian church denouncing Jesus, or their status as a church. Yet Paul says that they are deserting Jesus. Two prominent points stand out in this text.
First, what we believe truly matters. Since college, I've heard statements like, "Let's not split theological hairs" and "Just give me Jesus, and I don't need to dig into all the details." While I appreciate the effort to unify churches for the sake of the Kingdom, to deny the importance of what we believe denies Jesus altogether. Under the inspiration of the Holy Spirit, Paul writes an entire book dedicated to pointing the Galatian church in the correct theological direction. If we refuse to follow the rightly reveal God of the Bible, then we refuse God altogether.
Second, we see the importance of a healthy, well-worded rebuke. We don't like the word rebuke. It seems mean and insensitive. However, we need one another to help us see what we cannot see. What if Paul were to refuse the awkward conversation, and never write to the Galatians. Like a rifle aimed just millimeters off, down range the trajectory of the church would be much further off.
The word "disciple" literally means "learner." When we trust in Jesus, we enroll in the school of Jesus. Let's be diligent students, sitting at the feet of Jesus learning more of his goodness, kindness, and holiness.
Below you'll find excellent resources that can help refine and shape our theological understanding and grasp of the gospel. Here are several:
- Christian Beliefs: Twenty Basics Every Christian Should Know by Wayne and Elliot Grudem
- The Gospel Coalition a great website following current events and relevant theological and practical issues
- The Briefing Dr. Albert Mohler is a trusted friend. Time.com called him the “reigning intellectual of the evangelical movement in the U.S.” Dr. Mohler exercises wise insight on contemporary issues.
 For am I now seeking the approval of man, or of God? Or am I trying to please man? If I were still trying to please man, I would not be a servant of Christ.
(Galatians 1:10 ESV)