At the beginning of the famous encounter between St. Juan Diego and Our Lady of Guadalupe, as Diego ascends Tepeyac Hill, he is suddenly surrounded by beautiful music and wondrous sights, whereupon he asks himself, "Where am I? Could this be the place that our ancestors spoke of -- the Flower World Paradise in the land of heaven?" With these words, St. Juan Diego ties his encounter to an ancient indigenous belief system -- a spiritual...