Judaism and the Jewish people are intertwined and interact in ways which nobody can fully grasp. Are we a religion, or a nation? If we are a religion, how can it be that somebody who does not believe in God or refuses to observe even one commandment still remains Jewish as long as he or she is born to a Jewish mother? And if we are a nation, how does religion come in, telling us who belongs to the nation and who does not? Any attempt to find a solution to this problem will always fail. This is one of the greatest mysteries of Jewish identity.