Once you move past the 11th chapter, the book of Genesis becomes a family story. And that story begins with Abraham and Sarah. In chapter 12 of Genesis, we hear how Abraham and Sarah (called Abram and Sarai at that point) are called away from their home and into a foreign land. What follows from that point are their adventures as they find their way in this new place, and then their struggles in creating a family together.
Family is a big theme in the Old Testament – in particular, male heirs. In the ancient world, having a son (or even better, many sons) was how you ensured the future of your family. A son could carry on your name, build his own wealth, and ensure that your name would be remembered for generations to come. Dying without a son not only meant that you did not have anyone to care for you in your old age, it meant that your name and memory would die with you. We pick up the Abraham and Sarah story here, at the re-assurance of God’s promise (Genesis 17:1-22).
To be clear: we no longer share these same values around only valuing male heirs, or of procreation being the most important part of a life well-lived. We know that eternal life does not come from male heirs, but from the gift of God’s grace offered through Jesus.
However, still in this story we discover the power of God to do the things we consider impossible. A child, at 99 years old! We discover the faithfulness of God – that God will deliver on the promise that has been made, even when it seems hopeless. We discover that God will continue to surprise us, again and again.