What Is the Book of Galatians About? Paul at His Most Urgent

Paul had a habit: open with thanks to God and praise for the church receiving the letter. Galatians is the one exception. The greeting ends and he goes straight in: "I marvel that ye are so soon removed from him that called you into the grace of Christ unto another gospel" (Galatians 1:6).

Why he was that alarmed

Someone was teaching the Galatian churches that Gentile believers had to be circumcised and keep the law of Moses to be genuinely saved.

Paul does not treat this as a doctrinal wobble but as a different gospel — which is why the letter contains his hardest sentence: "if any man preach any other gospel unto you than that ye have received, let him be accursed" (1:9).

I marvel that ye are so soon removed from him that called you into the grace of Christ unto another gospel.Galatians 1:6 (KJV)

What he confronted Peter about

2:11-14 records something rarely preached: Paul rebuked Peter to his face, in front of everyone.

Peter had been eating with Gentile believers, then withdrew once certain men arrived from Jerusalem. Paul calls it dissembling, and notes that even Barnabas was carried along.

His concern is not table manners but what the act communicates — if who you eat with depends on circumcision, the gospel has just acquired two tiers.

The main line: justified by faith

"A man is not justified by the works of the law, but by the faith of Jesus Christ" (2:16) — the point is made three times in that single verse, three different ways.

Then he argues from Abraham: Abraham was counted righteous four hundred and thirty years before the law was given (3:17). So the law cannot be the condition of righteousness — it did not yet exist.

Then what is the law for?

Paul raises the objection himself (3:19). His answer: the law was "our schoolmaster to bring us unto Christ" (3:24). The Greek word describes the household servant who walked a child to school — the job was delivery, not teaching.

What kind of freedom

5:1: "Stand fast therefore in the liberty wherewith Christ hath made us free."

Then he immediately blocks the misreading: "only use not liberty for an occasion to the flesh" (5:13). The letter argues on two fronts at once — against earning, and against using grace as cover. The fruit of the Spirit in 5:22-23 grows in the space between them.

Why this letter matters

Luther called Galatians the letter he was married to. Much of the Reformation grew out of this book. Six chapters, about forty minutes.

Read Galatians straight through in the BiblePro app — it is short and emotionally continuous, and breaking it into sittings loses the thread. And do look for a local church to read alongside others.