One of the most basic issues revealed about Abram throughout his story is his age. Abram is old; his wife Sarai is old. Furthermore, they are childless, without an heir to care for them in their old age, or even to see to their burial when they die. Yet God has promised Abram the immortality that comes through offspring - descendants so many that they are innumerable.

Now, three chapters later, Abram is still waiting, still growing older, still childless. Thus, as chapter 15 opens, it finds Abram listening and responding to God's promise with an impatient ear. God's pledge of protection and reward Abram deems hollow if the gift of an heir does not materialize. What good are all his possessions and all his future plans if this most basic need - a child - is not met? Abram points out that, …