The main concern Paul has in the churches of Galatia is legalism. Legalism is man’s way of defining scripture.

It is the opposite of giving control to the Holy Spirit.

Paul wastes no time in his letter to the Galatians correcting this error and speaking against those perpetrators of the false teaching and those preaching misinformation. Neither should we be slow in addressing known error because a little leaven can quickly affect the whole. We have in our society much misinformation in politics and in places that you would not expect, like the church.