Galatians 4:23
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What's easy to miss here is the active power of the "promise." Isaac wasn't just born in relation to a promise; the promise itself is presented as the divine cause and instrumental force behind his conception and birth, especially since natural possibility had passed. This highlights how God's promises aren't passive statements but dynamic realities that bring about what they declare, even against all odds.
But the son of the slave was born according to the flesh, while the son of the free woman was born through promise.
English Standard Version (ESV)
Paul uses the story of Abraham's sons, Ishmael and Isaac, to illustrate his point. Ishmael, born to a slave woman named Hagar, represented those trying to earn God's favor through obedience to the Law. In contrast, Isaac, born to Abraham's free wife Sarah, was conceived through a divine promise, symbolizing those who receive God's grace through faith.
Paul uses the dramatic story of Abraham's sons to show a fundamental difference in how we relate to God. One son comes through ordinary means, the other through extraordinary divine intervention.
In Galatians 4:23, Paul contrasts the births of Ishmael and Isaac to illustrate two distinct spiritual realities:
Birth 'According to the Flesh'
Birth 'Through Promise'
Why does Paul bring up these ancient births? He's exposing a dangerous spiritual mindset that tries to earn God's favor through effort, rather than receiving it as a gift.
Paul uses the contrast between Ishmael and Isaac to speak directly to the Galatians, many of whom were tempted to follow the Jewish Law to gain God's approval.
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The Ishmael Mindset (Law and Effort)
The Isaac Mindset (Grace and Promise)
Understand the original words
sarx · Greek Noun
In a biblical context, it refers to the fallen human nature—the tendency to act according to selfish, worldly desires apart from the empowering presence of the Holy Spirit. It stands in contrast to the spiritual life produced by God's grace.
epangelia · Greek Noun
A declaration or oath from God regarding future action or blessing. It emphasizes that God's redemptive work is initiated by His sovereign initiative and received through faith, rather than earned by human effort.
The stark contrast between Ishmael's natural birth and Isaac's miraculous birth highlights Paul's point: adherence to the Law (like Ishmael's lineage) results in bondage, while faith in God's promise (like Isaac's lineage) leads to freedom.
~1896 BC
Abraham is promised a son
God promises Abraham that he will have a son, and that his descendants will be as numerous as the stars. This promise is reaffirmed and forms the basis for Isaac's miraculous birth.
~1895 BC
Ishmael is born
Abraham's wife Sarah, unable to have children, gives her maidservant Hagar to Abraham. Ishmael is born from this union according to the normal course of nature.
~1894 BC— this verse
Isaac is born
Despite Sarah and Abraham's old age, Isaac is miraculously born to them through God's promise, signifying a birth not according to natural means.
~1874 BC
Hagar and Ishmael are sent away
Sarah demands Abraham send away Hagar and Ishmael, as Ishmael, the son born 'according to the flesh,' would not share the inheritance with Isaac, the son born 'through promise.'
This passage directly details God's promise to Abraham concerning Sarah, showing how Isaac's birth was tied to divine assurance rather than natural capability, mirroring the 'birth through promise' mentioned in Galatians.
Genesis 21:1-2This scripture narrates the fulfillment of God's promise with Isaac's birth, explicitly stating that Abraham and Sarah were blessed by God in a way that allowed them to have a child in their old age, highlighting the miraculous aspect of his conception.
Romans 9:7-9Paul here also uses the contrast between Abraham's sons to explain God's sovereign election, reiterating that 'through Isaac shall your offspring be named,' emphasizing that lineage is not by natural descent alone but by God's specific promise and calling.
Hebrews 11:11This verse highlights Sarah's faith in believing God's promise regarding Isaac, portraying her and Abraham's belief as the active element that allowed God's promised, yet naturally impossible, birth to occur.
calvinGalatians 4:21-26: "Tell me, ye that desire to be under the law, do ye not hear the law?"
- Tell me. Having given exhortations adapted to touch the feelings, he follows up his former doctrine by an illustration of great beauty. Viewed simply as an argument, it would not be very powerful; but, as a confirmation added to a most satisfactory chain of reasoning, it is not unworthy of attention.
To be under the law, signifies here, to come under the yoke of the law, on the condition that God will…
meyerGalatians 4:23: "But he who was of the bondwoman was born after the flesh; but he of the freewoman was by promise."
Galatians 4:23 presents the relation of diversity between the two, in contrast to the previously mentioned relation of similarity, according to which they both were sons of Abraham. κατὰ σάρκα ] according to the flesh , so that the birth was the result of a natural carnal intercourse. Differently in Romans 1:3 ; Romans 9:5 γεγέννηται ] is born; the perfect realizes the historicall…
What's easy to miss here is the active power of the "promise." Isaac wasn't just born in relation to a promise; the promise itself is presented as the divine cause and instrumental force behind his conception and birth, especially since natural possibility had passed. This highlights how God's promises aren't passive statements but dynamic realities that bring about what they declare, even against all odds.
Paul uses the story of Abraham's sons, Ishmael and Isaac, to illustrate his point. Ishmael, born to a slave woman named Hagar, represented those trying to earn God's favor through obedience to the Law. In contrast, Isaac, born to Abraham's free wife Sarah, was conceived through a divine promise, symbolizing those who receive God's grace through faith.
Paul uses the story of Abraham's sons, Ishmael and Isaac, to illustrate his point. Ishmael, born to a slave woman named Hagar, represented those trying to earn God's favor through obedience to the Law. In contrast, Isaac, born to Abraham's free wife Sarah, was conceived through a divine promise, symbolizing those who receive God's grace through faith.
"But the son of the slave was born according to the flesh, while the son of the free woman was born through promise." — What's easy to miss here is the active power of the "promise." Isaac wasn't just born in relation to a promise; the promise itself is presented as the divine cause and instrumental force behind his…
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Last reviewed October 2026
