you can be sure that I will bless you and give you many descendants. They will be as numerous as the stars of heaven and the sand of the seashore, and they will conquer their enemies.
Remember you swore a promise your servants Abraham, Isaac, and Jacob, telling them, ‘I will make your descendants as numerous as the stars of heaven, and give you all the land I promised to them, and they shall own it forever.’”
Even so the number of the people of Israel will be like the sand on the seashore that cannot be measured or counted. Then right there at the place where they were told ‘you are not my people’ they will be called ‘the children of the living God.’
God isn't a human being who would lie. He's not a mere mortal who changes his mind. Does he say he's going to do something but doesn't? Does he make promises he doesn't carry out?
That is why the descendants of Abraham (who was as good as dead!) became as numerous as the stars of heaven, as countless as the sand of the sea shore.