How, in this age of scientific rationalism, can we begin to understand religious visions and mystical experiences--now being reported by a growing number of people on the nightly news, across the internet, and by word-of-mouth? Dr. Lisa Bitel and Dr. Michael A. Arbib discuss visions from the Middle Ages to today, especially the tensions between cultural, spiritual, and neurological explanations for extraordinary sights, and consider new ways to understand these mysterious phenomena.Made possible by a generous contribution from K&L Gates