Grace Driscoll looks at the story of Sarah and her response to the Lord in Genesis 17 & 18:1-15. When Sarah laughs, it poses the question, how do I respond when God promises something that seems crazy within my own life? If God said I was going to have a child in old age (90's) would I laugh, cry, complain, or get angry at Him? What circumstances have we responded to in unhealthy ways that mock or doubt God rather than receive from Him? Does the unbelief in our hearts grow stronger than our faith in God when He fulfills His promises?