15:1 Why would Abram be afraid? Perhaps he feared revenge from the kings he had just defeated (14:15). God gave him two good reasons for courage: (1) He promised to protect Abram (“I am thy shield”), and (2) he promised to be Abram’s “exceeding great reward.” When you fear what lies ahead, remember that God will stay with you through difficult times and that he has promised you great blessings.
15:2, 3 Eliezer was Abram’s most trusted servant, acting as household administrator (“steward,” see also Genesis 24). According to custom, if Abram were to die without a son, his eldest servant would become his heir. Although Abram loved his servant, he wanted a son to carry on the family line.
15:5 Abram wasn’t promised wealth or fame; he already had that. Instead, God promised descendants like the stars of the heavens or the grains of sand upon the seashore (22:17), too numerous to count. To appreciate the vast number of stars scattered through the sky, you need to be, like Abram, away from any distractions. Or pick up a handful of sand and try to count the grains—it can’t be done! Just when Abram was despairing of ever having an heir, God promised descendants too numerous to imagine. God’s blessings are beyond our imaginations!
15:6 Although Abram had been demonstrating his faith through his actions, it was his belief in the Lord, not his actions, that made Abram right with God (Romans 4:1-5). We, too, can have a right relationship with God by trusting him. Our outward actions—church attendance, prayer, good deeds—will not by themselves make us right with God. A right relationship is based on faith—the heartfelt inner confidence that God is who he says he is and does what he says he will do. Right actions will follow naturally as by-products.
15:8 Abram was looking for confirmation and assurance that he was doing God’s will. We also want assurance when we ask for guidance. But we can know for sure that what we are doing is right if we do what the Bible says. Abram didn’t have the Bible—we do.
15:13, 14 The book of Exodus tells the story of the enslavement and miraculous deliverance of Abram’s descendants.
15:16 The Amorites were one of the nations living in Canaan, the land God promised Abram. God knew the people would grow more wicked and would someday need to be punished. Part of that punishment would involve taking away their land and giving it to Abram’s descendants. God in his mercy was giving the Amorites plenty of time to repent, but he already knew they would not. At the right time, they would have to be punished. Everything God does is true to his character. He is merciful, knows all, and acts justly—and his timing is perfect.
15:17 Why did God send this strange vision to Abram? God’s covenant with Abram was serious business. It represented an incredible promise from God and a huge responsibility for Abram. To confirm his promise, God gave Abram a sign—the smoking furnace and a burning lamp. The fire and smoke suggest God’s holiness, his zeal for righteousness, and his judgment on all the nations. God took the initiative, gave the confirmation, and followed through on his promises. God’s passing through the pieces was a visible assurance to Abram that the covenant God had made was real.