Paul uses the example of Abraham's sons, Ishmael and Isaac, to warn against becoming legalistic in our thinking. He explains how faith in the law will bring slavery, but faith in Christ will bring freedom.
Paul's concern for the Galatians continues as he questions how they can turn back to the slavery of false teaching and flattery. He encourages them the remember their past love and commitment to the one true gospel of Christ.
Paul elaborates on the wonderful Biblical truth of adoption. Those who trust in Christ receive the Holy Spirit and are freed from slavery to sin, they are adopted as a child of God and become an heir to eternal life.
Paul explains that the law is simply a sign that highlights our sinfulness and guilt, and points towards a needed Saviour. All those who trust in Christ are justified and adopted as God's children to inherit the blessings promised to Abraham.
Romans 8 v35-39 offers great encouragement to believers who may be distressed by the trials of life, reminding them that nothing in all of creation is able to separate them from the love of God in Christ Jesus our Lord.