For years I've used CPH's "Today's Light Bible," with devotions by Jane Fryer as my resource for daily Bible reading and meditation. Fryer's devotions are worth the price of the book. I was greatly encouraged by this devotion as Fryer wrote about Abraham and Sarah. In part, she wrote:
How like us - to think that somehow God can't or won't keep His Word, especially when we don't see Him fulfill His promises right away. How like God - to come to us, not with words of rebuke but of grace.
God asserts a remarkable truth to Abram and Sarai by changing their names. These desert nomads with dust in their sandals were, in reality, His royal children. Kings would come from Abraham. Sarai was now Sarah - "princess."