Loved ones, as we turn to Genesis 17, we must first notice what is absent: the voice of God. Between the end of chapter 16 and the beginning of chapter 17, thirteen long years of total silence have passed. Abram is now ninety-nine years old. Ishmael, the son of his fleshly compromise, is a teenager. For over a decade, Abram has lived with the consequences of his impatience, perhaps wondering if God had finally abandoned him, or perhaps assuming that Ishmael was the ultimate answer to the promise.
But God operates on His own timeline. He waited thirteen years for a specific reason: He waited until Abram’s body was “as good as dead” (Hebrews 11:12) and Sarah was far past the age of childbearing. God waited until the situation was humanly impossible so that when the son finally arrived, it would be undeniably clear that salvation comes by divine power, not human effort.
Genesis 17:1-27 records the reaffirmation of the covenant, the revelation of God as El Shaddai, the giving of new names to Abraham and Sarah, and the institution of circumcision as the bloody sign and seal of belonging to the covenant community.
Verses 1-8
1 When Abram was ninety-nine years old the Lord appeared to Abram and said to him, “I am God Almighty; walk before me, and be blameless, 2 that I may make my covenant between me and you, and may multiply you greatly.” 3 Then Abram fell on his face. And God said to him, 4 “Behold, my covenant is with you, and you shall be the father of a multitude of nations. 5 No longer shall your name be called Abram, but your name shall be Abraham, for I have made you the father of a multitude of nations. 6 I will make you exceedingly fruitful, and I will make you into nations, and kings shall come from you. 7 And I will establish my covenant between me and you and your offspring after you throughout their generations for an everlasting covenant, to be God to you and to your offspring after you. 8 And I will give to you and to your offspring after you the land of your sojournings, all the land of Canaan, for an everlasting possession, and I will be their God.”
El Shaddai and the New Names
The silence is broken with a majestic declaration: “When Abram was ninety-nine years old the LORD appeared to Abram and said to him, ‘I am God Almighty; walk before me, and be blameless.'” This is the first time the title El Shaddai (God Almighty, or God the All-Sufficient) is used in Scripture. God is reminding Abram that He has the power to overrule the deadness of nature. Because God is Almighty, He demands wholehearted devotion: “walk before me, and be blameless.”
Then, God does something profound: He changes Abram’s identity. “No longer shall your name be called Abram, but your name shall be Abraham, for I have made you the father of a multitude of nations.” Abram means “exalted father,” a name that must have felt like a cruel joke to a childless man for most of his life. But Abraham means “father of a multitude.” Notice the tense God uses: “I have made you.” The child is not yet conceived, but in the decree of God, it is already a finished reality. This promise extends far beyond physical Israel; it points directly to the ingathering of the Gentiles—a multitude of nations united by faith.
Verses 9-14
9 And God said to Abraham, “As for you, you shall keep my covenant, you and your offspring after you throughout their generations. 10 This is my covenant, which you shall keep, between me and you and your offspring after you: Every male among you shall be circumcised. 11 You shall be circumcised in the flesh of your foreskins, and it shall be a sign of the covenant between me and you. 12 He who is eight days old among you shall be circumcised. Every male throughout your generations, whether born in your house or bought with your money from any foreigner who is not of your offspring, 13both he who is born in your house and he who is bought with your money, shall surely be circumcised. So shall my covenant be in your flesh an everlasting covenant. 14 Any uncircumcised male who is not circumcised in the flesh of his foreskin shall be cut off from his people; he has broken my covenant.”
The Sign of Circumcision
With the covenant reaffirmed, God institutes a visible sign: “This is my covenant, which you shall keep… Every male among you shall be circumcised.” Why circumcision? Why this specific, painful, and intensely private mark?
First, consider the location. The sign was placed upon the reproductive organ. This was the exact place where Abraham had failed in the previous chapter by trusting in the “flesh” (Hagar) rather than the Spirit. It was a constant, physical reminder that life and the promised Seed would not come by human virility, but by the miraculous intervention of God.
Second, consider the action. It involved the shedding of blood and the cutting away of flesh. It symbolized the need for a deeper, spiritual surgery—the cutting away of the sinful heart (Deut. 10:16; Jer. 4:4). The Apostle Paul later explains that physical circumcision was a “seal of the righteousness that he had by faith” (Rom. 4:11).
The stakes were absolute: “Any uncircumcised male… shall be cut off from his people; he has broken my covenant.” To reject the sign was to reject the Covenant-Maker.
Verses 15-22
15 And God said to Abraham, “As for Sarai your wife, you shall not call her name Sarai, but Sarah shall be her name. 16 I will bless her, and moreover, I will give you a son by her. I will bless her, and she shall become nations; kings of peoples shall come from her.” 17 Then Abraham fell on his face and laughed and said to himself, “Shall a child be born to a man who is a hundred years old? Shall Sarah, who is ninety years old, bear a child?” 18 And Abraham said to God, “Oh that Ishmael might live before you!” 19 God said, “No, but Sarah your wife shall bear you a son, and you shall call his name Isaac. I will establish my covenant with him as an everlasting covenant for his offspring after him. 20 As for Ishmael, I have heard you; behold, I have blessed him and will make him fruitful and multiply him greatly. He shall father twelve princes, and I will make him into a great nation. 21 But I will establish my covenant with Isaac, whom Sarah shall bear to you at this time next year.” 22 When he had finished talking with him, God went up from Abraham.
The Laughter of Faith
God then turns His attention to the matriarch. “As for Sarai your wife, you shall not call her name Sarai, but Sarah shall be her name. I will bless her, and moreover, I will give you a son by her.” Both names mean “Princess,” but the change signifies her inclusion in the royal promise. She will be the mother of nations and kings.
Abraham’s reaction is deeply human. “Then Abraham fell on his face and laughed and said to himself, ‘Shall a child be born to a man who is a hundred years old?'” This is not the mocking laughter of unbelief, but the staggered, overwhelmed laughter of a man who finds the grace of God too good to be true.
Yet, Abraham still struggles to let go of his own plans. He prays, “Oh that Ishmael might live before you!” He begs God to just use the son he already has.
God’s answer is a firm, merciful “No.” “No, but Sarah your wife shall bear you a son, and you shall call his name Isaac [He Laughs].” God promises to bless Ishmael and make him a great nation, but the covenant—the redemptive line of the Messiah—must go through the miracle child, Isaac. God will not share His glory with the works of our flesh.
Verses 23-27
23 Then Abraham took Ishmael his son and all those born in his house or bought with his money, every male among the men of Abraham’s house, and he circumcised the flesh of their foreskins that very day, as God had said to him. 24Abraham was ninety-nine years old when he was circumcised in the flesh of his foreskin. 25 And Ishmael his son was thirteen years old when he was circumcised in the flesh of his foreskin. 26 That very day Abraham and his son Ishmael were circumcised. 27 And all the men of his house, those born in the house and those bought with money from a foreigner, were circumcised with him.
Immediate Obedience
The chapter concludes with a beautiful picture of restored faith. After struggling with doubt and alternative plans in the past, Abraham now acts with absolute resolve.
“Then Abraham took Ishmael his son and all those born in his house… and he circumcised the flesh of their foreskins that very day, as God had said to him.” There is no delay. Even at ninety-nine years old, Abraham submits to the painful requirement of the covenant, leading his household in immediate obedience.
Conclusion
Genesis 17 is a pivotal chapter for understanding how God relates to His people. He binds Himself to us with oaths, and He places signs upon us to mark us as His own. Under the New Covenant, the bloody sign of circumcision has been fulfilled in the cross of Christ—where He was “cut off” for our sins (Colossians 2:11-12). In its place, God has given us the bloodless sign of Baptism, marking our entrance into the covenant community.
Like Abraham, we are called to serve El Shaddai. When our circumstances scream that the promises of God are impossible, we must remember that we serve the God of the empty womb and the empty tomb. We must cast aside our “Ishmaels”—our backup plans and fleshly efforts—and trust entirely in the God who brings life from the dead.
Key Terms
- El Shaddai: Translated as “God Almighty.” It emphasizes God’s all-sufficient power to accomplish what nature cannot, specifically His ability to fulfill the covenant promises despite Abraham and Sarah’s advanced age.
- Sign and Seal: Theological terms used to describe sacraments (like Circumcision and Baptism). A sign points to a spiritual reality (the cutting away of sin), and a seal authenticates or guarantees God’s promise to the one who receives it in faith.
- Abraham/Sarah: The new names given by God. The change signifies a shift in destiny. Abraham (“Father of a Multitude”) and Sarah (“Princess”) reflect their roles as the spiritual parents of all who believe.
- Isaac: Meaning “He Laughs.” The name serves as a permanent memorial to both Abraham’s staggered incredulity and the sheer joy of God’s miraculous grace.
- Covenant Continuity: The principle seen in verse 7 (“to your offspring after you throughout their generations”), showing that God’s covenant is not just with individuals, but extends to their families, establishing the biblical basis for household inclusion in the covenant community.