Galatians 4:23 says that Abraham’s two sons were born in two different ways. Ishmael came through the ordinary human route, the son of Abraham and the servant Hagar, while Isaac came through God’s promise to Abraham and Sarah, who was free. Paul wrote this line in his letter to the churches of Galatia, where some believers were being pressed to accept circumcision and the law of Moses as necessary for salvation. He uses Abraham’s household to show them what kind of children belong to God’s promise.
However, the son by the servant was born according to the flesh, but the son by the free woman was born through promise.
Galatians 4:23 (WEB)
What Galatians 4:23 Means
The verse sets two sons side by side. The first is described as “born according to the flesh,” meaning he came into the world through normal human effort and ordinary means, with no special intervention from God. Abraham and Hagar were not wrong to have a child, but the child was the product of human planning and the customs of the time. The second son was “born through promise,” meaning his arrival depended on God’s word and God’s power to do what human bodies could not.
The verse does not say Ishmael was unloved or that God had abandoned him. Scripture elsewhere shows God caring for Ishmael. What the verse highlights is the source of the child who carries the promise. It does not promise that human effort is worthless, only that the blessing God intends to give comes by his word, received in faith.
The Context of Galatians 4:23
Galatians was written by the apostle Paul to churches he had founded in the Roman province of Galatia, most likely in the late 40s or 50s of the first century. His readers were largely Gentile believers who were hearing teachers insist that they must keep the Jewish law to be full members of God’s people. Paul’s argument is that the promise came to Abraham before the law was given, and that faith, not law-keeping, is the way into the family of God.
Just before verse 23, Paul asks the Galatians whether they really listen to the law they want to live under. He then turns to the story of Abraham’s two sons. Right after verse 23 he says these things contain an allegory, comparing Hagar and Mount Sinai with bondage, and the free Jerusalem above with the freedom of the children of promise. Read in that setting, verse 23 is the hinge of the illustration: the slave-born son stands for life under the law, and the promise-born son stands for life in God’s grace.
Key Phrases in Galatians 4:23
Romans 4:20-21
20 Yet, looking to the promise of God, he didn’t waver through unbelief, but grew strong through faith, giving glory to God, 21 and being fully assured that what he had promised, he was also able to perform.
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Paul describes Abraham’s faith in God’s promise, which grew stronger as he gave glory to God. This passage shows that the promise Isaac embodied was received by faith, the same way Paul says believers receive God’s blessing today.
Ephesians 2:8-9
8 For by grace you have been saved through faith, and that not of yourselves; it is the gift of God, 9 not of works, that no one would boast.
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These verses state plainly that salvation comes by grace through faith and not by works. They echo Galatians 4:23 by drawing a line between what God gives and what human effort can produce, a theme Paul develops across his letters.
A Short Prayer From Galatians 4:23
Father, you keep your promises even when I cannot see how they will come true. I confess that I often try to build my own way forward and then feel exhausted when it falls short. Teach me to rest in the promise you have given through Christ, and to trust your word more than my own strength. Help me to live as a child of that promise, free from the fear of never measuring up. Amen.
