Abram asks God how he can be sure.
He has just believed the impossible. God showed him a sky full of stars and promised him a family to match, and Scripture counted his trust as righteousness. Now God speaks again and names Himself by what He has already done. "I am the LORD, who brought you out of Ur of the Chaldeans to give you this land to possess" (Genesis 15:7). And the man just called righteous for believing asks a blunt, honest question: "Lord GOD, how can I know that I will possess it?" (Genesis 15:8). Here, asking for certainty is part of faith, and God treats the question as fair. He takes it seriously and answers it.
His answer looks strange to us and was unmistakable to Abram. "Bring Me a heifer, a goat, and a ram, each three years old, along with a turtledove and a young pigeon" (Genesis 15:9). Abram kills the animals and splits them "down the middle, and laid the halves opposite each other" (Genesis 15:10), a path of blood with an aisle down the centre. This was how people of that world made a covenant they meant to keep. The two who were binding themselves would walk together between the pieces, as good as saying, may I be torn apart like these animals if I break my word.
Then the afternoon wears on. Birds of prey come down on the carcasses and Abram drives them away (Genesis 15:11). As the sun sets a deep sleep falls on him, and "great terror and darkness overwhelmed him" (Genesis 15:12). In the dark God tells him the long road ahead before any of it happens: four hundred years as strangers in a land not their own, slavery, then judgment on the nation that enslaves them, then a people walking out with great possessions, and Abram himself buried in peace at a ripe old age (Genesis 15:13-16). God writes the future into Abram's hearing, so that generations later, worn down in Egypt, his children can remember it was promised.
Then the covenant is cut, and here is the wonder of it. "A smoking firepot and a flaming torch appeared and passed between the halves" (Genesis 15:17). Fire and smoke, the way God will one day come down on Sinai. God moves along the path of blood while Abram lies asleep, and He binds only Himself. The man who wanted to know is left out of the ceremony altogether; the promise now rests on God's side alone. He takes its whole weight onto His own name and swears by the only one greater He could swear by, which is Himself (Hebrews 6:13).
Centuries on, God kept this oath at a price no one beside that firepot could have guessed. The covenant He swore alone and would never break, He honoured by carrying its curse Himself. "Christ redeemed us from the curse of the law by becoming a curse for us" (Galatians 3:13). The torch that passed between the pieces was already on its way to a cross.
So when you need to know God will keep His word, look at the lengths He has gone to so you can. He gave Abram an oath, cut in blood, and a history written down in advance, so the promise could be carried for four hundred years by people who held nothing else. To know the God who speaks is to bring Him your honest question the way Abram did, and then go and read back what He has already bound Himself to. Write down the promise that is keeping you while its fulfilment is still far off, and read it again on the nights the tent feels empty.
What has God promised that you are still waiting on, and where could you write it down tonight, so that years from now you can point to the day He said it?
The Doxa Deeper Dive
Cutting the Covenant: The Oath God Swore Alone (Genesis 15)
The covenant God cuts with Abram in Genesis 15 is one of the strangest scenes in the Bible, and one of the most important. Abram has asked how he can know the land will be his (Genesis 15:8). God's answer is a ceremony, and every part of it carried a meaning a man of Abram's world would have read at once.
What did it mean to cut a covenant?
When Genesis says "the LORD made a covenant with Abram" (Genesis 15:18), the Hebrew underneath is more physical than that flat English verb. It is karath (H3772), which means simply to cut, joined to berith (H1285), a binding agreement. In Hebrew you never make a covenant; you cut one, and the idiom comes straight from a ritual like this chapter's. Animals were cut in two, the halves laid opposite each other with a lane between them, and the parties to the agreement walked that lane together. Jeremiah 34 describes the very same practice centuries later: men of Judah who cut a calf in two and walked between its parts to seal an oath, then broke it. To walk between the halves was to pray the animals' fate onto yourself, as if to say, may I be split like this if I fail my word. So when Abram asks for certainty, God gives him the most binding thing his culture had, an oath sworn in blood and butchery, impossible to misread.
Why did God put Abram into a deep sleep?
As the sun set, "a deep sleep" fell on Abram (Genesis 15:12). The word is tardemah (H8639), and it is rare and deliberate. It is the same deep sleep God brought on Adam when He opened his side and built the woman (Genesis 2:21). Both times God does the decisive work while the man can do nothing but lie there. Abram cannot help cut this covenant. He cannot even stay awake for it. The words "great terror and darkness overwhelmed him" (Genesis 15:12) name the weight of God drawing near, the same dread that will later fall on Israel at the foot of a burning mountain.
What were the smoking firepot and the flaming torch?
When full dark had come, "a smoking firepot and a flaming torch appeared and passed between the halves" (Genesis 15:17). The firepot is tannur (H8574), a clay oven or furnace, and the torch is lappid (H3940), a flaming brand. Smoke and fire are how God shows Himself all through the story that follows: the furnace and torch here, the smoking mountain at Sinai, the pillar of cloud and fire that will lead Israel through the wilderness. This is God Himself, come down small enough to move along a lane of split carcasses in the dark.
Why did only God pass between the pieces?
Here is the turn the whole chapter has been building toward. In every other covenant of this kind, both parties walked the path of blood, because both were binding themselves to keep it. Abram walks nothing. He is asleep. God alone, as fire and smoke, moves down the bloody lane, and puts Himself under the curse of a broken covenant. The promise of a land and a countless family now rests on one thing, God's faithfulness to His own oath. This is grace, shown in fire, ages before Sinai and the law that would name it. God binds Himself to bless, stakes His own name on it, and does it while the man He is blessing sleeps through the whole ceremony.
How far does this oath reach?
Paul says the covenant God made with Abraham was settled long before the law of Moses and could not be annulled by it (Galatians 3:17). The oath God swore alone that night He would keep at the cross, where the curse Abram never had to walk into fell on Christ instead: "Christ redeemed us from the curse of the law by becoming a curse for us" (Galatians 3:13). God passed between the pieces alone because, in the end, He would carry the covenant's cost alone.
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