Galatians: One Gospel

Galatians 1:6-9

Notice the tone of Paul's language. He is disturbed that some in Galatia are deserting the One who called them in the grace of Christ. He uses military language: They are deserting or in the process of turning away from the gospel. Paul is astonished that this departure is happening so quickly after he left. They are embracing a substitution of the gospel, which Paul says is no gospel at all.