Charles Spurgeon Commentary Genesis 15:14-17

"and also that nation, whom they shall serve, will I judge: and afterward shall they come out with great substance. But thou shalt go to thy fathers in peace; thou shalt be buried in a good old age. And in the fourth generation they shall come hither again; for the iniquity of the Amorite is not yet full. And it came to pass, that, when the sun went down, and it was dark, behold, a smoking furnace, and a flaming torch that passed between these pieces." — Genesis 15:14-17 (ASV)

True emblems of the Church of God with her smoke and her light, her trying affliction, yet the grace by which she still keeps burning and shining in the world.