Genesis 15:1 After these things the word of the LORD came to Abram in a vision, saying, “Do not fear, Abram, I am a shield to you; Your reward shall be very great.” 2 Abram said, “O Lord GOD, what will You give me, since I am childless, and the heir of my house is Eliezer of Damascus?” 3 And Abram said, “Since You have given no offspring to me, one born in my house is my heir.” 4 Then behold, the word of the LORD came to him, saying, “This man will not be your heir; but one who will come forth from your own body, he shall be your heir.” 5 And He took him outside and said, “Now look toward the heavens, and count the stars, if you are able to count them.” And He said to him, “So shall your descendants be.” 6 Then he believed in the LORD; and He reckoned it to him as righteousness. 7 And He said to him, “I am the LORD who brought you out of Ur of the Chaldeans, to give you this land to possess it.” 8 He said, “O Lord GOD, how may I know that I will possess it?” 9 So He said to him, “Bring Me a three year old heifer, and a three year old female goat, and a three year old ram, and a turtledove, and a young pigeon.” 10 Then he brought all these to Him and cut them in two, and laid each half opposite the other; but he did not cut the birds. 11 The birds of prey came down upon the carcasses, and Abram drove them away. 12 Now when the sun was going down, a deep sleep fell upon Abram; and behold, terror and great darkness fell upon him. 13 God said to Abram, “Know for certain that your descendants will be strangers in a land that is not theirs, where they will be enslaved and oppressed four hundred years. 14 “But I will also judge the nation whom they will serve, and afterward they will come out with many possessions. 15 “As for you, you shall go to your fathers in peace; you will be buried at a good old age. 16 “Then in the fourth generation they will return here, for the iniquity of the Amorite is not yet complete.” 17 It came about when the sun had set, that it was very dark, and behold, there appeared a smoking oven and a flaming torch which passed between these pieces. 18 On that day the LORD made a covenant with Abram, saying, “To your descendants I have given this land, From the river of Egypt as far as the great river, the river Euphrates.
In this passage we see once again that it is God who comes to Abram and commits Himself to do what He has said, but again it is not because Abram was a good man with merits. Abram had done nothing but sin and yet we see God working with Abram by grace. Earlier in Genesis God had made promises to Abram, but here we see Abram wondering about the promise. God stated the promise and Abram believed the promise. The text tells us that this was reckoned to him as righteousness. We see the glory of God in the Gospel of grace alone in this. Abram was just wondering around as his forefathers had done, but God came to him and made a promise to him. This promise was based on the purposes of God and came to Abram apart from anything he had done. God has to be the initiator in the Gospel or it is not grace alone. God has to show grace apart from worth and merit or it is not grace alone. This is so clearly seen in God’s dealings with Abram.
Why did God reckon righteousness to Abram when he believed the promise? There are different ways to approach this, but perhaps the best way from the biblical history is to look at it from a Christ-centered view. Faith itself is not righteousness as it is the gift of God, so the person with true faith is one that has been given the gift of faith. Once a person has faith, that person is in some way united to Christ and so righteousness is imputed or reckoned to that person. The righteousness, however, that is imputed is the righteousness that Christ worked while He was incarnate and on earth. The righteousness that was reckoned to Abram, then, was the righteousness that Christ was going to work and Christ was the promised seed of Abram. This is so glorious that the seed that was promised to Abram was the One who was going to work the righteousness that was given to Abram.
We then see the grace of God not only making the promise and giving Abram faith, but He makes the promise based on a covenant in which He basically staked His Divinity on carrying out the promise. This is sheer and uncompromised grace. God took the initiative in coming to and calling Abram, He gave Abram faith to believe that one of his descendants would be the Savior, and He then “walked” between the pieces of the animals which stood for His saying may this happen to Me if I don’t do this. We don’t see Abram making any promise at this point to do anything for his part of the covenant. This was the grace of God on display and for all to marvel at how God is self-sufficient and has no need of human beings to help Him in any way. This also shows us how God is working to fulfill His promise of a curse to the serpent as well. God fulfills His promises of curse but also of blessing. He is sovereign and all-powerful and no one can stand in His way to either curse or carry out His promise that He fulfills by grace alone.