We’re going to pick up our story today in Genesis chapter 21 – hopping over chapters 19 & 20 – but I would certainly encourage you to go back and read those chapters sometime this week – that will help you fill in the blanks of the story yourself.
Now while you’re turning to Genesis 21 in your Bibles, let me give you just a really quick summary of the story so far.
As I’ve pointed out before, the key issue in the whole story of Abraham is the issue of descendants. Namely that Abraham had none. One of the first bits of information that we read about Abraham was that his wife Sarah, had been unable to become pregnant. And of course, this is a big deal for any family, but it was particularly an issue for Abraham’s family because God had specifically promised to Abraham that his descendants would grow to become a great nation and they would inherit the land of Canaan or as we often call it “the Promised Land”. God was going to bless all of Abraham’s descendants and they in turn would be a blessing to every family on the earth.
However, through most of our story, Abraham has been childless. Several times God has appeared and reaffirmed his promise to Abraham – but by the time Abraham was 85, he still had no child on the horizon. So Abraham and Sarah decided to be proactive and help God out a little bit. They decided that Abraham should have a child with Sarah’s servant, Hagar. This was culturally acceptable – but was certainly not what God had in mind. The problems and the discord that this caused in the family became evident almost immediately. As soon as Hagar was pregnant, Hagar treated Sarah with contempt and Sarah treated Hagar so harshly that she ran away even before the child was born. Thankfully, God intervened and Hagar returned to Sarah and Abraham – and in due time, Hagar had her baby – little Ishmael.
Well, for many years, Abraham raised Ishmael as his dearly loved, one and only son – the son that he presumed was God’s promised child. But when Ishmael was 13 years old God appeared to Abraham and again reaffirmed his promise that Abraham would have a son – and that son would be born from Sarah – even though she was now 90 years old. God further clarified that Sarah’s son, Isaac, would be the one whom God would bless and would cause his descendants to grow to be a great nation – they would inherit the promised land, and they would be a blessing to every family on earth.
Of course, this was exactly what God had promised 24 years earlier – God’s plans had not changed even though Abraham and Sarah had not been careful to follow his plan. Despite their lack of faith, God remained faithful and today, we finally get to the part of the story where God finally does exactly what he said he would do for Abraham & Sarah. So in Genesis chapter 21, verse 1 we read:
The Lord kept his word and did for Sarah exactly what he had promised. 2 She became pregnant, and she gave birth to a son for Abraham in his old age. This happened at just the time God had said it would. Genesis 1:1-2
I love how this chapter starts: The Lord kept his word. He did exactly what he had promised. Despite the impossibility of it all – (considering that Abraham and Sarah were well past the age of having children – Abraham was 100 and Sarah was 90) – despite the impossibility of them having children, God kept his Word.