When will God finish the work that He started? Twenty-five years after God first called Abraham and Abraham set out on his journey of faith, God's promise that Abraham would have a son by Sarah his wife is finally fulfilled! Unfortunately, the miraculous birth of Isaac doesn't mean that Abraham and his family go on to live happily ever after. But does the continuing conflicts in Abraham's household mean God has stopped working in Abraham's life? This week we continue our journey through Genesis with chapter 21 and the birth of Isaac, the son of promise. We'll see God continue to work in Abraham's life through the blessings and the conflicts to produce a faith in Abraham more precious than gold. And we'll see how Abraham's story parallels the work of sanctification that God works in our own lives today.