This is a great look at Scripture concerning Israel and the Church in the form of a Catechism. Questions are asked and then Scripture is given verbatim for the answer:
Q.1. Who is a Jew?
A. “He is not a Jew who is one outwardly, nor is circumcision that which is outward in the flesh; but he is a Jew who is one inwardly, and circumcision is that of the heart” (Romans 2:28-29).