15 God also said to Abraham, “As for Sarai your wife, you are no longer to call her Sarai; her name will be Sarah. 16 I will bless her and will surely give you a son by her. I will bless her so that she will be the mother of nations; kings of peoples will come from her.”
17 Abraham fell facedown; he laughed and said to himself, “Will a son be born to a man a hundred years old? Will Sarah bear a child at the age of ninety?” 18 And Abraham said to God, “If only Ishmael might live under your blessing!”
19 Then God said, “Yes, but your wife Sarah will bear you a son, and you will call him Isaac. I will establish my covenant with him as an everlasting covenant for his descendants after him. 20 And as for Ishmael, I have heard you: I will surely bless him; I will make him fruitful and will greatly increase his numbers. He will be the father of twelve rulers, and I will make him into a great nation. 21 But my covenant I will establish with Isaac, whom Sarah will bear to you by this time next year.” 22 When he had finished speaking with Abraham, God went up from him.
23 On that very day Abraham took his son Ishmael and all those born in his household or bought with his money, every male in his household, and circumcised them, as God told him. 24 Abraham was ninety-nine years old when he was circumcised, 25 and his son Ishmael was thirteen; 26 Abraham and his son Ishmael were both circumcised on that very day. 27 And every male in Abraham’s household, including those born in his household or bought from a foreigner, was circumcised with him. Genesis 17:15-27
All along Abraham did not think that the blessing would be through his wife Sarai. He had a point because he was 100 years old and she was 90.
But God knew all along what the lineage would be. He knew that Abraham would have a child through Hagar. He also knew what He had promised, and it didn’t include Hagar. Again, we have the benefit of knowing and studying the full story. We know all the missteps they would take, and all the joys along the way.
If it had happened today, perhaps Abraham would have responded with, “Is this a joke? Are you for real?” because it seemed preposterous to him. It was an impossibility.
But it was as true as you’re reading this. And to accent the point, the Lord told Abrahm to proceed with the circumcisions of males within his sphere of influence and household.
The obvious takeaway from this is God still performs the impossible. In the natural sense, it was hopeless for Abraham and Sarah. Now, does that mean He’ll bail you out of a situation you got yourself into? Does it mean He’ll provide you with a miracle when you want one just because you want one? No to both questions.
Often those miracles come in a form you would not expect it in.
It’s all a part of His character of blessing His children and drawing them close to Himself.