Paul doesn’t ease his way into Galatians. Normally, one of his letters begins with thanksgiving for the church he’s addressing. Here, after offering grace and peace, Paul moves almost immediately to astonishment: “I’m amazed that you are so quickly deserting the one who called you by the grace of Christ to follow another gospel” (Galatians 1:6 CEB).

Something serious is happening in Galatia. The believers had heard the good news that through Jesus Christ, God was creating a new people. Christ “gave himself for our sins to rescue us from this present evil age” (v. 4). Their place in that family began with what God had done in Christ, not with what they could accomplish for themselves. But other teachers had arrived with an addition.

Faith in Jesus was important, they said, but Gentile believers also needed to take on the practices that marked Jewish identity, including circumcision and observance of the Law. If they wanted to belong fully to God's covenant people, Jesus apparently wasn’t enough. Paul calls that “another gospel,” before immediately correcting himself: there really isn’t another gospel at all.

The concern isn't that obedience no longer matters. Galatians will have plenty to say about how people who belong to Christ should live. Paul will call believers to walk by the Spirit, bear the fruit of the Spirit, serve one another through love, carry one another’s burdens, and refuse the destructive desires of the flesh.

Grace does not leave us unchanged. But there is a tremendous difference between being transformed because we belong to Christ and trying to transform ourselves so that we may belong to Christ. Paul won't allow those two things to be confused.

God calls us by grace. Christ gives himself for us. The Spirit transforms us. Our obedience grows from what God has already begun.

That distinction is still important because we can quietly add requirements to the gospel ourselves. We may never demand circumcision from someone who wants to follow Jesus, but we can create our own unwritten qualifications for who really belongs.

Sometimes those qualifications are theological traditions. Sometimes they're political or cultural assumptions. Sometimes they're expectations about appearance, worship, background, behavior, or how quickly someone's life should change. Without realizing it, we can begin communicating, “Yes, Jesus saves you—but you'll really belong when you become more like us.” Paul would recognize the danger.

The gospel creates a people whose common identity is Jesus Christ. The church isn't held together because everyone shares the same background, preferences, experiences, or traditions. We belong together because the crucified and risen Jesus has called us together by grace.

Paul himself is evidence of what that grace can do. He reminds the Galatians that he once violently persecuted the church. He wasn't searching for Christianity or gradually reconsidering his beliefs. He was trying to destroy the very faith he now proclaimed. Then God called him by grace. The persecutor became the preacher.

The man who once tried to destroy the church became an apostle sent to announce Christ among the Gentiles. Eventually, people who had once known Paul only by reputation were saying, “The man who used to persecute us now preaches the faith he once tried to destroy” (v. 23). And their response was to glorify God.

That's what grace does. It doesn't simply overlook who we have been. Grace meets us, calls us, forgives us, and begins forming something new within us. That's why Paul guards the gospel so fiercely. If belonging ultimately depends upon our ability to make ourselves acceptable, grace has been emptied of its meaning. But if our life with God begins with Christ's self-giving love, then transformation becomes our response to grace rather than our attempt to earn it.

As we begin Galatians, Paul gives us something worth holding onto through the entire letter:
Don't add to the gospel. Don't subtract from the gospel. And don't confuse the fruit of grace with the price of grace.

We are called by grace, brought together in Christ, and then invited to let the Holy Spirit reshape our lives into the likeness of the One who called us.

Notice one expectation you may unintentionally place on other Christians before you consider them to “really belong.” Bring it honestly before God today, and ask the Holy Spirit to help you distinguish the gospel of grace from your own preferences or traditions.