Paul expresses his earnest desire for the salvation of the Jews,
The Jews have a zeal for God, but not according to knowledge, they sought salvation by works, and not by faith in Christ.
The righteousness which is of the law described.
That which is by faith described.
He that believes and calls on the name of the Lord shall be saved,
What is necessaary to salvation–believing, hearing, preaching,, a Divine mission, the Gospel, and obedience to its precepts.
Faiith comes by hearing.
The universal spread of the Gospel predicted by the prophets.
The ingratitude and disobedience of the Israelites.