Genesis 15:1-18 · God’s Covenant with Abram
Living by a Promise
Genesis 15:1-18
Sermon
by Elizabeth Achtemeier
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The preacher who confronts the three stated texts for this Sunday once again faces the confusing situation of wondering how on earth the three lessons are related. Perhaps several answers are possible, but to my mind, all three of them have to do with living by a promise.

 In the context of our Genesis text, Abraham and Sarah and their households have obeyed the command of God and left Ur of the Chaldees (v. 7; cf. 11:31), settled temporarily at Haran in Mesopotamia, and then journeyed on to Canaan, the land that God showed them. They were promised that the land would belong to them and their descendants, and that they would become the forbears of a great nation (Genesis 12:1-7).

 Now, however, Abraham and his company simply wander through the land that still belongs to the Canaanites. Both Abraham and his wife Sarah are old, past the age of childbearing, and the promises that the Lord gave them in the past seem impossible of fulfillment. The future that God previously laid out before them was apparently nothing but a dream and an empty assurance that had caused them to leave everything familiar and to become pilgrims and wanderers in a foreign country. It is in that situation, without hope for the future, that our text begins.

 A mysterious and hidden God appears to Abraham in this passage. His Word comes to the aged man, first in a vision (v. 1), and then in a dream (v. 12), and his presence is indicated by the strange symbols at night of a smoking fire pot and flaming torch (v. 17). Nevertheless, his words are spoken to Abraham.

 The first Word is that Abraham will have many posterity: "Your reward will be very great" (v. 1), and Abraham simply does not believe that Word. In fact, in response to the promise that he will have many descendants, Abraham blasphemously replies in so many words, "No, I won't. I have no son of my own, and the only heir to be found in my house is the son of my slave-woman, who will inherit all my property, as is the custom in these parts" (vv. 2-3). This father of our faith was no model of unshakable trust in the Lord.

 God has a way of never giving up on the recipients of his promises, however, so he takes Abraham outside to look at the stars and to count them, if Abraham is able. And at that point, the Lord renews his promise: "That's how many descendants you will have." More, the Lord inspires in Abraham faith in the promise. "Abraham believed the Lord," reads our text, "and the Lord reckoned it to him as righteousness" (v. 6).

 This is the first account of righteousness by faith that we find in the scriptures. The Christian Church has always confessed that we are counted righteous or justified in God's sight by grace through faith alone. Here, our father Abraham becomes the pioneer in that faith.

 We should note carefully, however, what faith consists in, for this story also characterizes the faith we are to have. Abraham's faith in the Lord consists in the fact that he believes God's promise, despite all appearances to the contrary, and so Abraham will act from now on as if that promise will come true. God has now opened the future to him and assured him that he will have a son, from whom will spring those many descendants that the Lord has said he will have. Abraham has simply to wait for the promise to be fulfilled.

 The same is true in the remainder of the stated lesson. In the mysterious and awesome dream of sacrifice that Abraham undergoes, God promises that he will also give to Abraham's descendants the land on which Abraham is sleeping, from the border of the Nile to the Euphrates in the North. (The borders are those of the davidic empire.) More than that, in the strange symbolism of passing through the cut pieces of the sacrifice, God himself promises that he will be destroyed, like the cut animals, if he does not keep his Word! Once again, Abraham is called upon simply to wait for the promise's fulfillment, despite all the evidence against it.

 Our life with God is very much like father Abraham's, for we too have been given lots of promises by our Lord. "Lo, I am with you always, to the close of the age" (Matthew 28:20). "Whoever would save his life will lose it; and whoever loses his life for my sake and the gospel's will save it" (Mark 8:35).  "Fear not, little flock, for it is your Father's good pleasure to give you the kingdom" (Luke 12:32). "I will not leave you desolate; I will come to you" (John 14:18). "He who believes in me, though he die, yet shall he live, and whoever lives and believes in me shall never die" (John 11:25-26).

 Faith, therefore, consists in believing those promises and acting as if they will come true. To be sure, the evidence seems often against the fulfillment of Christ's words. When we are beset by trouble on every side, or when pain is our daily fare; when every circumstance seems to go against us and there seems to be no hope for the future; when we sacrifice for the sake of the gospel and find no peace or reward whatsoever; when we stand beside the grave of a loved one, and sorrow washes over us, do Christ's promises of his presence, of his peace and joy and abundant life, of his eternal life in the kingdom, do away with the empty desolation and give us a future full of hope? Often all the evidence seems to point in the opposite direction, and we are like those of whom Paul speaks in our Epistle lesson (Philippians 3:17--4:1), with our minds dominated only by the terrible nature of earthly things.

 Surely that could have been true also of our Lord as he journeyed toward that cross in Jerusalem. Some kindly Pharisees advised him to flee from his task and to save his own life, according to our Gospel lesson (Luke 13:31-35). What future was there for anyone who died a torturous death? But our Lord's reply was steadfast in his faith that God owned his future. "I finish my course," he replied. "I must go on my way today and tomorrow and the day following; for it cannot be that a prophet should perish away from Jerusalem."

 Faith trusts God's promises, despite all the evidence to the contrary. Faith simply waits for God to fulfill those promises, and knows that he will do so. So faith acts in that sure knowledge that the Word of God will come to pass. And it goes on its way today and tomorrow and the day following, and it finishes its course.

 We have lots of evidence to show that it is true. God kept his promises of descendants and land to Abraham. And God kept his promise to our Lord that on the third day he would rise from the dead. So faith is holding fast to the promises of God, no matter what else happens, for God always keeps his Word. We can count on it.

CSS Publishing, Preaching and Reading from the Old Testament: With an Eye to the New, by Elizabeth Achtemeier