Should I believe that Jesus is my personal savior? Or should I believe that God made a covenant with the Jews requiring every Jew to keep the commandments of the Torah? Should I believe that Mohammad was Allah’s last prophet and that Ali, the prophet’s cousin and husband of his daughter Fatima, ought to have been the first caliph, or that Mohammad was Allah’s last prophet and that Ali was the fourth and last caliph? Should I believe that the resurrected prophet Moroni dictated the Book of Mormon to Joseph Smith? Or that Ahura Mazda, the benevolent Creator, is at cosmic war with the malevolent Angra Mainyu? And on and on it goes. Only the most arrogant provincialism could allow someone to believe that the holy documents that happen to be held sacred by the clan he was born into are true, while all the documents held sacred by the clans he wasn’t born into are false.