Paul knows that the Judaizers have come and pressured the Galatians to submit to the demands of old covenant law (Acts 15:1). He asks a question in order to help the Galatians realize that they are being deceived by outsiders (Judaizers),1 and kept from obeying the truth of the gospel (righteousness through faith in Christ).2
7 You were running well. Who hindered you from obeying the truth?