credentials as the Messiah who supernaturally fulfilled prophecies from the Hebrew Scriptures (Matthew 11:1–11). One reason Christianity has failed to exert much influence on the major intellectual institutions of America is that too many Christians hold their beliefs in an uninformed and precarious fashion. Instead of pursuing answers to the toughest questions an unbelieving world can marshal, they attempt to preserve certainty through ignorance and isolation, relying on platitudes rather than arguments.