Later text
But when the time had fully come, God sent His Son, born of a woman, born under the law,
Intertextuality Pair
Echo
Later text
But when the time had fully come, God sent His Son, born of a woman, born under the law,
Earlier text
Genesis 3:15BSB
And I will put enmity between you and the woman, and between your seed and her seed. He will crush your head, and you will strike his heel."
The first gospel is spoken to the serpent, before any word of judgment to the man and the woman: "And I will put enmity between you and the woman, and between your seed and her seed. He will crush your head, and you will strike his heel" (Genesis 3:15). The promise is tied to the woman and to a coming offspring, and the Old Testament follows that offspring as the story unfolds: Seth, "another seed in place of Abel" (4:25), Abraham's offspring through whom "all nations of the earth will be blessed" (22:18), and the son of David whose throne God will establish (2 Samuel 7:12). Throughout, the promise waits on God's timing.
Galatians picks up that thread one chapter earlier. "The promises were spoken to Abraham and to his seed. The Scripture does not say, 'and to seeds,' meaning many, but 'and to your seed,' meaning One, who is Christ" (3:16). The law, Paul says, "was added because of transgressions, until the arrival of the seed to whom the promise referred" (3:19). Galatians 4:4 announces that arrival: "But when the time had fully come, God sent His Son, born of a woman, born under the law." The seed has come, at the time God set.
The link to Genesis 3:15 is an echo and should be stated with care. The phrase "born of a woman" is, on its own, the ordinary way of saying someone is human: "Man, who is born of woman, is short of days and full of trouble" (Job 14:1). The phrase alone does not prove an allusion. What carries the echo is its setting. Paul has just spent a chapter on the promised seed and its arrival, and he describes that arrival in terms of a woman and her child. Read in that context, the Son "born of a woman" is the woman's seed of Eden. The Treasury of Scripture Knowledge lists Genesis 3:15 at this phrase, and the vault's Eve trajectory reads the verse the same way.
Paul pairs the two phrases on purpose. The words "born of a woman" mean the Son shares our humanity in full; the words "born under the law" mean He takes on the covenant obligation, and with it the curse, that rested on those He came for. The purpose clause follows: "to redeem those under the law, that we might receive our adoption as sons" (4:5). The crushing of the serpent's head therefore comes by the woman's seed bearing the curse, not by force alone (3:13), and its outcome is not only victory but sonship. The final stroke is still to come, "The God of peace will soon crush Satan under your feet" (Romans 16:20), so the promise is fulfilled already and awaits its completion.
The telos is the Father's welcome. The promise made in Eden is kept by the Father sending His own Son, and it ends with rebels made children: "And because you are sons, God sent the Spirit of His Son into our hearts, crying out, 'Abba, Father!'" (Galatians 4:6). The seed of the woman did not only defeat the enemy. He brought us home, and seeing that is what turns the old promise into praise.