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Public-domain commentary
Matthew Henry
From his Commentary on the Whole Bible. Henry comments on passages, not single verses — this entry covers Genesis 17:15–22. His three-level outline is real structure in the source text, so it is rendered as structure.
Here is, I. The promise made to Abraham of a son by Sarai, that son in whom the promise made to him should be fulfilled, that he should be the father of many nations; for she also shall be a mother of nations, and kings of people shall be of her, Gen 17:16. Note, 1. God reveals the purposes of his good-will to his people by degrees. God had told Abraham long before that he should have a son, but never till now that he should have a son by Sarai. 2. The blessing of the Lord makes fruitful, and adds no sorrow with it, no such sorrow as was in Hagar's case. "I will bless her with the blessing of fruitfulness, and then thou shalt have a son of her." 3. Civil government and order are a great blessing to the church. It is promised, not only that people, but kings of people, should be of her; not a headless rout, but a well-modelled well-governed society.
II.The ratification of this promise was the change of Sarai's name into Sarah (Gen 17:15), the same letter being added to her name that was to Abraham's, and for the same reasons. Sarai signifies my princess, as if her honour were confined to one family only. Sarah signifies a princess - namely, of multitudes, or signifying that from her should come the Messiah the prince, even the prince of the kings of the earth.
III.Abraham's joyful, thankful, entertainment of this gracious promise, Gen 17:17. Upon this occasion he expressed,
1.Great humility: He fell on his face. Note, The more honours and favours God confers upon us the lower we should be in our own eyes, and the more reverent and submissive before God.
2.Great joy: He laughed. It was a laughter of delight, not of distrust. Note, Even the promises of a holy God, as well as his performances, are the joys of holy souls; there is the joy of faith as well as the joy of fruition. Now it was that Abraham rejoiced to see Christ's day. Now he saw it and was glad (Joh 8:56); for, as he saw heaven in the promise of Canaan, so he saw Christ in the promise of Isaac.
3.Great admiration: Shall a child be born to him that is a hundred years old? He does not here speak of it as at all doubtful (for we are sure that he staggered not at the promise, Rom 4:20), but as very wonderful and that which could not be effected but by the almighty power of God, and as very kind, and a favour which was the more affecting and obliging for this, that it was extremely surprising, Psa 126:1, Psa 126:2.
IV.Abraham's prayer for Ishmael:
O that Ishmael might live before thee! Gen 17:18. This he speaks, not as desiring that Ishmael might be preferred before the son he should have by Sarah; but, dreading lest he should be abandoned and forsaken of God, he puts up this petition on his behalf. Now that God is talking with him he thinks he has a very fair opportunity to speak a good word for Ishmael, and he will not let it slip. Note,
1.Though we ought not to prescribe to God, yet he gives us leave, in prayer, to be humbly free with him, and particular in making known our requests, Phi 4:6. Whatever is the matter of our care and fear should be spread before God in prayer.
2.It is the duty of parents to pray for their children, for all their children, as Job, who offered burnt offerings according to the number of them all, Job 1:5. Abraham would not have it thought that, when God promised him a son by Sarah, which he so much desired, then his son by Hagar was forgotten; no, still he bears him upon his heart, and shows a concern for him. The prospect of further favours must not make us unmindful of former favours.
3.The great thing we should desire of God for our children is that they may live before him, that is, that they may be kept in covenant with him, and may have grace to walk before him in their uprightness. Spiritual blessings are the best blessings, and those for which we should be most earnest with God, both for ourselves and others. Those live well that live before God.
V.God's answer to his prayer; and it is an answer of peace. Abraham could not say that he sought God's face in vain.
1.Common blessings are secured to Ishmael (Gen 17:20): As for Ishmael, whom thou art in so much care about, I have heard thee; he shall find favour for thy sake; I have blessed him, that is, I have many blessings in store for him.
(1.)His posterity shall be numerous: I will multiply him exceedingly, more than his neighbours. This is the fruit of the blessing, as that, Gen 1:28.
(2.)They shall be considerable: Twelve princes shall he beget. We may charitably hope that spiritual blessings also were bestowed upon him, though the visible church was not brought out of his loins and the covenant was not lodged in his family. Note, Great plenty of outward good things is often given to those children of godly parents who are born after the flesh, for their parents' sake.
2.Covenant blessings are reserved for Isaac, and appropriated to him, Gen 17:19, Gen 17:21. If Abraham, in his prayer for Ishmael, meant that he would have the covenant made with him, and the promised seed to come from him, then God did not answer him in the letter, but in that which was equivalent, nay, which was every way better.
(1.)God repeats to him the promise of a son by Sarah: She shall bear thee a son indeed. Note, Even true believers need to have God's promises doubled and repeated to them, that they may have strong consolation, Heb 6:18. Again, Children of the promise are children indeed.
(2.)He names that child - calls him Isaac, laughter, because Abraham rejoiced in spirit when this son was promised him. Note, If God's promises be our joy, his mercies promised shall in due time be our exceeding joy. Christ will be laughter to those that look for him; those that now rejoice in hope shall shortly rejoice in having that which they hope for: this is laughter that is not mad.
(3.)He entails the covenant upon that child: I will establish my covenant with him. Note, God takes whom he pleases into covenant with himself, according to the good pleasure of his will. See Rom 9:8, Rom 9:18. Thus was the covenant settled between God and Abraham, with its several limitations and remainders, and then the conference ended: God left off talking with him, and the vision disappeared, God went up from Abraham. Note, Our communion with God here is broken and interrupted; in heaven it will be a continual and everlasting feast.
Historical interpretation
Historical Reception
2 surviving comments on this verse. Each one is dated, so this reads as a timeline rather than a list.
For what follows: "And I will establish My covenant with him for an everlasting covenant, and with his seed after him," etc. He says his seed in those who, by imitating the faith of Abraham, merit to hear from the Lord: "Blessed are you who weep now, for you shall laugh" (Luke 6:21); to such as these the Apostle, joining himself, says: "Now we, brethren, as Isaac was, are children of promise" (Galatians 4:28). Specifically, however, the name Isaac, that is, laughter, which is born from the promise, fittingly applies to the Mediator between God and men, about whose birth an angel said to the shepherds: "Do not be afraid, for behold, I bring you good tidings of great joy which will be to all people" (Luke 2:10).
And the Lord said to Abraham: "Sarah your wife shall bear you a son, and you shall call his name Isaac." Isaac is interpreted as Laughter, and it is not to be doubted that he was so called because when his birth was announced, Abraham laughed in his heart. This laughter fittingly signifies the joy of the New Testament, in which the children of the promise, with the Lord dwelling within them, shall rejoice forever.
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Summary
Genesis 17:19 marks a pivotal moment in the Abrahamic covenant, as God unequivocally declares that Sarah, Abraham's aged wife, will indeed bear him a son, Isaac, through whom the everlasting covenant will be established and extended to his descendants. This divine pronouncement clarifies the lineage of promise, dispelling any doubt that Ishmael would be the heir, and underscores God's sovereign power to fulfill His promises in miraculous ways, even against all human expectation.
Context
Literary Context
This verse is deeply embedded within the narrative of Genesis 17, which details God's reaffirmation and expansion of His covenant with Abram (now Abraham). Prior to this, in Genesis 15, God had promised Abraham a multitude of descendants and the land of Canaan, but without specifying the mother of the promised heir. Abraham and Sarah, having waited many years, took matters into their own hands, resulting in the birth of Ishmael through Hagar (Genesis 16). However, in Genesis 17, God introduces the sign of circumcision, changes Abram's name to Abraham ("father of a multitude") and Sarai's to Sarah ("princess"), and for the first time explicitly states that Sarah herself will bear the promised son. Verse 19 directly follows Abraham's plea for Ishmael to live before God (Genesis 17:18), to which God responds with this definitive declaration regarding Isaac.
Historical & Cultural Context
In the ancient Near East, the concept of a male heir was paramount for the continuity of the family line, inheritance, and social standing. Barrenness was considered a great misfortune, often interpreted as divine disfavor. The practice of a barren wife giving her maidservant to her husband to bear children on her behalf (as Sarah did with Hagar) was a recognized custom, though it frequently led to domestic strife, as seen in Genesis 16. God's promise that Sarah, at ninety years old, would bear a child was not only biologically impossible but also culturally astounding, highlighting the supernatural nature of God's intervention. The establishment of a "covenant" (bᵉrîyth) was a solemn and binding agreement, often sealed with rituals (like passing between cut animals in Genesis 15) and involving specific promises and obligations.
Key Themes
Genesis 17:19 powerfully reinforces several key themes. Firstly, it underscores God's faithfulness to His promises, demonstrating that His word will be fulfilled regardless of human limitations or previous missteps. Secondly, it highlights divine sovereignty, as God, not human effort, determines the heir of the covenant. Thirdly, the theme of miraculous birth is central, setting a precedent for other significant births in biblical history. Finally, it solidifies the establishment of the covenant lineage through Isaac, ensuring the continuation of the promise that ultimately points to the nation of Israel and, ultimately, to the Messiah. The naming of Isaac, meaning "laughter," also subtly introduces the theme of joy and disbelief that accompanies God's extraordinary works, as seen in Genesis 18:12-15.
Exposition and Analysis
Key Word Analysis
From the root meaning "to build," this word signifies a male offspring, emphasizing his role as a builder or continuer of the family name and lineage. In this context, Isaac is not merely "a son" but the son through whom the entire covenantal future will be constructed and sustained.
Meaning "laughter" or "he laughs," this name is prophetically given by God. It encapsulates the initial reaction of both Abraham (Genesis 17:17) and Sarah (Genesis 18:12) to the seemingly impossible promise of a child in their old age. The name serves as a perpetual reminder of God's ability to bring joy and fulfillment out of human incredulity.
This term refers to a solemn, binding agreement or compact. In this verse, it is repeated to emphasize its establishment as an "everlasting covenant." It signifies God's unbreakable commitment to Abraham, Isaac, and their descendants, a relationship initiated and maintained by divine grace and faithfulness.
This word denotes a duration that extends indefinitely into the future, often translated as "eternal" or "perpetual." When applied to God's covenant, it underscores its permanent and unchanging nature, signifying that God's promises and His relationship with His chosen line will endure through all generations, beyond the lifespan of any individual.
Verse Breakdown
"And God said, Sarah thy wife shall bear thee a son indeed;"
This opening clause highlights the divine initiative and authority. God, the ultimate covenant-maker, directly addresses Abraham, explicitly naming Sarah as the mother of the promised son. The word "indeed" (Hebrew, ʼăbâl) adds emphasis and certainty, dispelling any lingering doubt or Abraham's previous assumption that Ishmael would suffice. It is a direct, undeniable confirmation against all natural odds.
"and thou shalt call his name Isaac:"
God not only promises the son but also commands Abraham to name him. This act of naming by divine decree signifies God's sovereignty over the child's identity and destiny. The name "Isaac" (meaning "laughter") prophetically encapsulates the human reaction to God's impossible promise and will serve as a constant reminder of God's miraculous intervention and the joy it brings.
"and I will establish my covenant with him for an everlasting covenant, and with his seed after him."
This final, crucial clause reveals the purpose of Isaac's birth: he is the designated heir through whom the Abrahamic covenant will be formally established and perpetuated. The repetition of "covenant" and the descriptor "everlasting" underscore the permanence and unbreakable nature of God's promise. The covenant is not just with Isaac but extends to his "seed after him," ensuring the continuation of the chosen lineage and the fulfillment of God's grand redemptive plan through future generations.
Literary Devices
The verse employs several powerful literary devices. Divine Speech is paramount, as God Himself directly addresses Abraham, lending absolute authority and certainty to the promise. The Repetition of the word "covenant" ("I will establish my covenant with him for an everlasting covenant") serves to emphasize the central theme of God's unbreakable commitment and the enduring nature of His promises. Furthermore, the naming of Isaac and the promise to his "seed after him" functions as a clear Foreshadowing, pointing to the future generations of the covenant people and the unfolding of God's redemptive plan through this specific lineage. There is also a subtle Irony in the name Isaac ("laughter"), which alludes to Abraham's and Sarah's initial disbelief and laughter at the seemingly impossible prospect of a child in their old age, transforming their doubt into a name of joy and fulfillment.
Theological and Thematic Connections
Genesis 17:19 stands as a profound testament to God's unwavering faithfulness and sovereign power. It reiterates that God's promises are not contingent on human ability or conventional expectations but are rooted in His divine will and capacity to perform the impossible. This verse clarifies the specific line of the covenant, ensuring that the promises made to Abraham—of a great nation, land, and blessing to all families of the earth—would flow through Isaac, the son of promise, rather than Ishmael, the son of human effort. It highlights the principle that God's chosen path often defies human logic, requiring faith in His miraculous intervention. The "everlasting covenant" signifies the enduring nature of God's relationship with His people and His commitment to His redemptive plan throughout history.
Reflection and Application
Genesis 17:19 is a powerful reminder that God is faithful to His promises, even when they seem impossible from a human perspective. Abraham and Sarah had waited for decades, and in their old age, the idea of having a child was not just improbable but biologically ludicrous. Yet, God, in His infinite wisdom and power, declared it would happen. This should encourage us to trust in God's timing and His methods, even when they defy our understanding or expectations. What "impossible" promises has God spoken into your life, whether through His Word or through a clear sense of His leading? This verse calls us to move beyond our natural limitations and to embrace the supernatural possibilities that lie within God's will. It also reminds us that God's plans are often generational, extending beyond our immediate lives to impact those who come after us. Our faithfulness today can lay foundations for blessings for future generations.
Questions for Reflection
FAQ
Why was it so important for the son to come through Sarah and not Ishmael?
It was crucial for the promised son to come through Sarah because God explicitly designated her as the mother of the covenant heir, as stated in Genesis 17:15-16. While Ishmael was Abraham's biological son, his birth was the result of human effort and impatience (Sarah giving Hagar to Abraham, Genesis 16:1-4), not a direct fulfillment of God's miraculous promise. God's choice of Sarah, despite her barrenness and advanced age, underscored that the covenant's establishment was solely by divine power and grace, not by human contrivance or natural means. This ensured that the heir would be a "son of promise," demonstrating God's sovereign ability to bring life out of what seemed dead (Romans 4:19-21).
What does "everlasting covenant" truly mean in this context?
The term "everlasting covenant" (Hebrew, bᵉrîyth ʻôwlâm) signifies a covenant that is perpetual, enduring through all generations, and never to be broken by God. It emphasizes the unchanging nature of God's commitment to Abraham, Isaac, and their descendants. While the specific terms and expressions of the covenant might evolve (e.g., the Mosaic Law, the New Covenant), the fundamental relationship and promises of blessing, land, and a chosen people remain eternally valid from God's perspective. It assures that God's redemptive plan, initiated through Abraham, will ultimately reach its predetermined conclusion, culminating in the Messiah.
Christ-Centered Fulfillment
The miraculous birth of Isaac, the "son of laughter," through whom God established His everlasting covenant, profoundly foreshadows the ultimate "Seed" of Abraham: Jesus Christ. Just as Isaac's birth defied natural possibilities, so too the virgin birth of Jesus (Luke 1:34-37) demonstrates God's sovereign power to bring about His redemptive purposes in supernatural ways. The covenant established with Isaac, and extended to his "seed after him," finds its ultimate and comprehensive fulfillment in Christ, who is the true spiritual "seed" of Abraham (Galatians 3:16). Through Him, the promises of blessing to all nations (Genesis 12:3) are realized, as all who believe in Christ become spiritual descendants of Abraham and heirs of the everlasting covenant, not through physical lineage or ritual, but through faith (Romans 4:13-16). The "everlasting covenant" with Isaac points forward to the New Covenant in Christ's blood, which offers eternal salvation and a permanent relationship with God for all who trust in Him (Hebrews 9:15). Thus, Isaac's birth is a vital step in the unfolding divine drama that culminates in the person and work of Jesus, the Lamb of God, who takes away the sin of the world (John 1:29).