Romans 9:27-33

And this is what the prophet Isaiah said about the people of Israel, “The people of Israel are as many as the grains of sand along the beach. But only a few who are left will be saved. The Lord will be quick and sure to do on earth what he has warned he will do.” Isaiah also said, “If the Lord All-Powerful had not spared some of our descendants, we would have been destroyed like the cities of Sodom and Gomorrah.” What does all this mean? It means that the Gentiles were not trying to be acceptable to God, but they found that he would accept them if they had faith. It also means that the people of Israel were not acceptable to God. And why not? It was because they were trying to be acceptable by obeying the Law instead of by having faith in God. The people of Israel fell over the stone that makes people stumble, just as God says in the Scriptures, “Look! I am placing in Zion a stone to make people stumble and fall. But those who have faith in that one will never be disappointed.”