Tim Keller | October 5, 1997
The book of Galatians is not for non-Christians. It’s not for unbelievers. It’s not for people who say, “Oh, I don’t believe the gospel.” The whole book of Galatians is a book on the gospel, a book communicating the gospel, explaining the gospel, applying the gospel, and it’s a book for Christians, a book for people who say they believe it.
To break down this passage, first, Paul shows us the need for controversy, essentially why and when we need controversy. Secondly, he tells us what the authority is to appeal to in controversy, the method of conducting it. Again, we’re talking about Christians struggling with beliefs. Thirdly, he tells us how to heal controversy.