Once, at the end of a field trip to the Atlanta Masjid of Al-Islam, the imam ended his meeting with students by saying, 'Our deepest desire is not that you become Muslim, but that you become the best Christian, the best Jew, the best person you can be. In the name of God, the Most Gracious, the Most Merciful. Thank you for coming.' Then he was gone, leaving me with a fresh case of holy envy.