In the renewal of the covenant shortly before the birth of Isaac, God's purpose for mankind was gain made plain. "All the nations of the earth shall be blessed in him," was the assurance of the Lord concerning the child of promise. Genesis 18:18. And later the heavenly visitant once more declared, "In thy seed shall all the nations of the earth be blessed." Genesis 22:18.

Da Gud fornyede pagten kort før Isaks fødsel, blev det atter gjort klart, hvad der var Guds plan med menneskeheden. Herren sagde om løftets søn: "Alle jordens folk skal velsignes i ham." 1Mos. 18,18. På et senere tidspunkt sagde den himmelske gæst endnu engang: "I din sæd skal alle jordens folk velsignes." 1Mos. 22,18.