What Does Genesis 15:8 Mean?

But Abram said: "Lord Lord, how can I know that I will gain possession of it?" The second question within this chapter's covenant dialogue: after the offspring question, the land question. How can I know? The question is not faithless; Abram just received a righteousness verdict in verse 6 for his faith. The question is covenant-specific: given that the promise is real, what is the mechanism by which its certainty will be established? How does the promise become guarantee? The question invites the covenant-making ceremony of the chapter's second half.

In the ancient Near Eastern world, significant agreements between parties were formalized through covenant-cutting ceremonies. The parties would divide animals, walk between the pieces, and invoke a curse on the party that broke the agreement: "May what happened to these animals happen to me if I break this covenant." The request for a way to "know" the promise was likely a familiar idiom for requesting formal covenant ratification. Abram is asking God to make the promise official through the recognized ceremony of covenant-making.

The divine response to "Abram's request for formal assurance is one of the most remarkable passages in the Old Testament: God alone passes between the pieces. When the covenant ceremony is performed, the divine presence in the form of the smoking firepot and flaming torch passes between the divided animals without Abram. This means God alone bears the covenant obligation; it is an unconditional grant rather than a bilateral agreement. The certainty Abram asked for is provided by divine self-obligation, which is the only kind of certainty that cannot ultimately be broken. Jesus confirmed the Abrahamic covenant by being the one in whom both parties to the covenant were united, the human who would keep it and the divine who guaranteed it.