What Does Genesis 15:5 Mean?

He took him outside and said: "Look up at the sky and count the stars, if indeed you can count them." Then he said to him: "So shall your offspring be." The command to look at the stars is one of the most visually memorable moments in the entire patriarchal narrative. God takes Abram outside into the night sky, where the stars of a pre-industrial Middle Eastern night would have been incomprehensibly numerous, and says: count them. The exercise is impossible. It is meant to be impossible. The offspring will be that numerous.

The stars comparison for Abram's offspring joins, in the cumulative promise pattern of Genesis, the "dust of the earth" comparison of 13:16 and the "sand on the seashore" comparison of 22:17. Each one is an image of uncountable multitude. God does not give Abram a specific number; He gives him an image of a category that transcends numbering. The covenant is not a limited and specifiable blessing; it is a blessing that exceeds the capacity of any census or accounting system. The stars of heaven, the dust of the earth, the sand of the sea, are all ways of saying: the number exceeds your mathematics.

The specific use of the stars comparison here, rather than the dust or sand, is significant. Stars are seen at night; Abram is receiving this promise in a nighttime vision. The darkness that accompanied his earlier question about the servant-heir is the same darkness in which the stars make their appearance. The answer to the question asked in the night arrives as a vision of night sky beyond counting. What cannot be seen in daylight is revealed at night; what cannot be counted in ordinary numbers is promised in extraordinary images. Jesus said Abraham rejoiced to see His day: the night vision was the beginning of that joy.