Down the Bloody Alleyway By Himself
So Abraham prepares the animals. Obviously, however, God is not a human being to walk beside Abraham between animals. Abraham falls into a deep sleep, and in his sleep he sees a firepot, something to represent the presence of God. What is so stunning is that instead of the firepot moving between the animals side by side with Abraham (so that the two of them are saying, in effect, “May it be done to us if either of us breaks the covenant”), God goes down this bloody alleyway all by himself. He takes the full responsibility for the fulfilment of the covenant all by himself. That is grace.
- D. A. Carson, The God Who is There, 51-52