Nowadays, some Christians think that God is too invisible to be fully trusted, or our problems just too big for an unseen Deity to handle. This helps us appreciate what Abraham, and now Sarah, were up against. Until this time, God had been molding Abraham, but Sarah, the “Princess of many nations” now needed special handling. Perhaps 25 years of childlessness had grown within her a cynicism for what could be, because of what had never been. If you’ve ever felt that way, then you can appreciate what Sarah was going through. But now God would teach her, and will teach us today, this wonderful reality: the All-Powerful God faithfully keeps His promises despite knowing our tendency to faithlessness. See how our passage shows not just the warm heart of Abraham and the wavering heart of Sarah, but above all, the unwavering faithfulness of our God.