Paul, an apostle, not of men, neither by man, but by Jesus Christ, and God the Father, who raised Him from the dead; Galatians 1:1
Every book in our Bible is special in its own way, and the book of Galatians is so special that some Bible scholars have labeled it as the Magna Carta of our faith, for the way in which it presents and defends the Gospel. One of the main reasons why Paul wrote the epistle was to counter the doctrine of the Judaizers who insisted that the Gentile Christians in Galatia needed to follow such laws as circumcision.
In the first two chapters of the book, Paul presents the personal argument that the Gospel that he preached is God’s genuine message to the Gentiles, including those in Galatia. He first presents a defence of his own apostleship, now a Gospel preacher who used to be more zealous of the law than any of the Judaizers ever were.
In chapters 3 and 4, Paul presents the doctrinal argument that the Gospel is God’s superior message to the Gentiles. The grace of Christ, he declares, is superior to the law as given through Moses. It is superior in the new relationship it creates between God and us. And it is also superior in the privileges that it offers to the Christians.
Chapters 5 and 6 present Paul’s practical argument that the Gospel is God’s message of freedom to the Gentiles. He describes how the love of Christ frees us from the bondage of the law and its demands on our lives. And he describes how the Gospel and the salvation it brings enables us to enjoy the freedom to obey our Lord and to serve others.
Galatians, the book that unveils to us the reality, the superiority, and the liberating power of the Gospel. -Jim MacIntosh
Here is the link to the video of this message: https://youtu.be/74is7TV8PJ8