What was God preparing Israel to do?
God was preparing the nation of Israel to be used as His instrument to bring Gentiles to a knowledge of their God. This preparation was prophetic, aimed at a future time when Israel could fulfill that role in God's program.
Les teaches that God was dealing with His nation Israel and preparing them for the time when they could be used to bring a Gentile to a knowledge of their God. This was all prophecy. The context shows that after Israel rejected, the same premise continued into the book of Acts, where Peter strictly appealed to the Jew as an extension of that program. Later, a body of truth called the mysteries was given through Paul.