Galatians 4:21-31
Children of the Promise
21Tell me, you who want to be under the law, do you not understand what the law says?
22For it is written that Abraham had two sons, one by the slave woman and the other by the free woman.
23His son by the slave woman was born according to the flesh, but his son by the free woman was born through the promise.
24These things serve as illustrations, for the women represent two covenants. One covenant is from Mount Sinai and bears children into slavery: This is Hagar.
25Now Hagar stands for Mount Sinai in Arabia and corresponds to the present-day Jerusalem, because she is in slavery with her children.
26But the Jerusalem above is free, and she is our mother.
27For it is written: “Rejoice, O barren woman, who bears no children; break forth and cry aloud, you who have never travailed; because more are the children of the desolate woman than of her who has a husband.”
28Now you, brothers, like Isaac, are children of promise.
29At that time, however, the son born by the flesh persecuted the son born by the Spirit. It is the same now.
30But what does the Scripture say? “Expel the slave woman and her son, for the slave woman’s son will never share in the inheritance with the free woman’s son.”
31Therefore, brothers, we are not children of the slave woman, but of the free woman.
Berean Standard Bible
Paul asks those who want to be under the law whether they have listened to what the law says. He turns to Abraham's two sons, one born by the slave woman and one by the free woman. The first was born according to the flesh; the second through the promise.
Paul says these women represent two covenants. Hagar corresponds to Mount Sinai and bears children into slavery. Sarah corresponds to the Jerusalem above, which is free, and she is our mother. The point is not an ethnic insult against Hagar's descendants or a denial of the dignity of enslaved people. Paul is using the story as an argument about covenant status and the source of inheritance.
He quotes Isaiah's call for the barren woman to rejoice because the children of the desolate woman will be more numerous than those of the woman who has a husband. The promise does not follow ordinary expectations. God creates a family whose future depends on His word.
As Isaac was born according to the Spirit, so it is now. The child born according to the flesh persecuted the child born according to the Spirit, and Paul says Scripture records the slave woman's son being sent away because he would not share the inheritance with the free woman's son.
Paul concludes that believers are not children of the slave woman but of the free woman. Freedom is not a claim of superior human worth. It is the status God grants through His promise in Christ.
How We Know
Genesis records Sarah's barrenness, Hagar's motherhood, the birth of Isaac through God's promise, and the conflict that led Abraham to send Hagar and Ishmael away. Galatians is reading those events as part of the larger story of promise and inheritance.
Isaiah's call for the barren woman to sing is likewise used in the passage itself, showing that Paul is interpreting Israel's Scripture rather than inventing a new family story detached from it.
Questions
1 Which two sons does Paul place in contrast?
AnswerHe contrasts Abraham's son born by the slave woman with the son born by the free woman, one according to the flesh and one through promise.
2 What do Hagar and Sarah represent in Paul's argument?
AnswerPaul uses them to represent two covenants: one associated with slavery and one associated with the freedom of God's promise.
3 How did Isaac come into the family?
AnswerIsaac was born through God's promise rather than ordinary human expectation. His birth displays God's ability to create the promised future.
4 To which woman does Paul say believers belong as children?
AnswerHe says believers are children of the free woman, receiving their standing through God's promise in Christ.
What This Means for Us
Paul's difficult use of Hagar and Sarah is about covenant identity, not permission to despise an ethnic group or people who have been enslaved. The center of his argument is that God's family is created by promise, not secured by human status.
A household can ask what it is relying on for belonging. If the answer is ancestry, achievement, or conformity to a group, we have returned to a fragile foundation. God's promise gives freedom and calls us to treat fellow heirs with dignity.
Prayer
God of promise, thank You for giving us freedom and a place in Your family through Christ. Keep us from pride, contempt, and status-seeking, and teach us to live as grateful heirs. Amen.