What does Galatians 4:31 mean?
What is the meaning of Galatians 4:31?

Therefore

Paul concludes his allegory with a decisive “Therefore,” anchoring the statement in everything he has just taught (Galatians 4:21–30). He is looking back to:

• God’s covenant with Abraham that produced two distinct lines—Hagar’s and Sarah’s—representing law versus promise (Genesis 16; Genesis 21:1-3).

• The instruction to “cast out the slave woman and her son” (Galatians 4:30), showing that the law cannot coexist with grace as a basis for our standing before God (Romans 10:4).

Because the argument is settled in Christ, this transitional word calls us to rest in what God has already accomplished rather than striving under the old system (Hebrews 4:9-10).


Brothers

By calling his readers “brothers,” Paul reminds believers that they share a common, Spirit-wrought family bond.

• Jesus is “not ashamed to call them brothers” (Hebrews 2:11), proving the intimacy we now have with Him.

• This sibling language contrasts sharply with the distant relationship produced by slavery to the law (John 15:15).

• It also signals unity: whether Jew or Gentile, every believer stands on equal footing in the household of faith (Galatians 3:26-28).


We are not children of the slave woman

Hagar and Ishmael picture life under the Mosaic law—performance-based, earth-bound, and ultimately powerless to secure inheritance.

• “The slave has no permanent place in the family” (John 8:35), highlighting the insecurity of legalism.

• Those who rely on the works of the law are “under a curse” (Galatians 3:10) because perfect obedience is impossible.

• Living as a “child of the slave woman” produces fear and bondage (Romans 8:15), manifesting in a conscience never fully at rest.


but of the free woman

In contrast, Sarah and Isaac represent the covenant of promise fulfilled in Christ.

• “The Jerusalem above is free, and she is our mother” (Galatians 4:26), declaring a heavenly origin for all who trust the gospel.

• Freedom here is not autonomy but Spirit-empowered life flowing from God’s grace (2 Corinthians 3:17).

• As Isaac was born “through the promise” (Galatians 4:23), every believer is supernaturally born again, receiving an irrevocable inheritance (1 Peter 1:3-4).

• “So if the Son sets you free, you will be free indeed” (John 8:36), confirming that our status can never revert to slavery.


summary

Galatians 4:31 anchors our identity in the gospel, declaring that believers belong to Sarah’s line of promise, not Hagar’s line of slavery. Because Christ fulfilled the law and secured our adoption, we stand in lasting freedom, enjoy full family privileges, and look forward to an eternal inheritance that law-keeping could never earn.

Why does Paul reference Sarah and Hagar in Galatians 4:30?
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