And if Christianity doesn't adapt, Bishop Spong says, it will die. "As people change, liturgy has to change. I don't know why that's so difficult to understand," he told more than 200 people at the Church of St. John the Evangelist on Elgin Street yesterday, the first of a two-day conference organized by the Canadian Centre for Progressive Christianity, with the theme Religionless Christianity. ...[snip]The Christian calendar is full of stories and observances that are drawn not from historical occurrences, but absorbed instead from Jewish traditions, Bishop Spong said. Palm Sunday can be traced to the lulav, a bundle of...