how
How so?
What does "not all Israel is Isreal" mean?
Since Paul said, "not all Israel is Israel" then what did Paul mean when he said "in this way all Israel will be saved"?
Who exactly is "all Israel"?
Not all Israel is Israel. I believe Paul is speaking here of "the Israel of God", which refers to believing Israelites. Paul is making an argument to answer, why isn't all of Israel saved?
He shows first that not every son of Abraham qualifies, only the son of promise, Isaac. And not every son of Isaac, but the chosen son, Jacob. And not every son of Jacob, but those who believe. And throughout, he maintains the distinction between Jew and Gentile.
Much love!