On the last Sunday in September 2015, the Reverend Stephen Blackmer stopped beside the stand of beech stumps where he had once performed the chain-saw Eucharist. He was leading a dozen or so members of the Church of the Woods on a contemplative walk. With his plaid shirt, decades-old custom Limmer hiking boots, and graying beard sans mustache, Blackmer didn’t look the part of a religious professional. He skipped nimbly over roots and rocks, turning around to laugh or make a point. His talk swept from exuberant to pensive to crass; at times he sounded like the theologically astute priest…