Thematic Bible: A spiritual church within it

Not that God's message has failed. For not everybody who is descended from Israel really belongs to Israel, nor are they all children of Abraham because they are descended from him, but he was told, "The line of Isaac will be called your descendants." That is to say, it is not his physical descendants who are children of God, but his descendants born in fulfilment of the promise who are considered his true posterity.

God has not repudiated his people, which he had marked out from the first. Do you not know what the Scripture says in speaking of Elijah, how he appealed to God against Israel? "Lord, they have killed your prophets, they have demolished your altars, I am the only one left and they are trying to take my life." But what is God's reply? "I have left myself seven thousand men who have never knelt to Baal!" read more.
So too at the present time there is a remnant selected by God's mercy. But if it is by his mercy, it is not for anything they have done. Otherwise, his mercy would not be mercy at all. What follows? Israel failed to get what it sought, but those whom God selected got it.