In the Torah, in the prophecy of Bilaam, Israel is described as a nation which shall dwell alone. This, however, does not mean that Israel is to keep itself isolated from mankind. As Rabbi Yehuda HaLevi explains in his classic treatise of Jewish Faith, “The Kuzari,” Israel is the “heart of the nations.” Like the heart which sends life to all other organs from its central location in the body, Israel too is the source of the spiritual life of the nations, and often times physical blessing as well. A new book, “Lighting Up The Nations: Jewish Responsibility Towards the...