I first met nature writer and philosophy professor Kathleen Dean Moore in 2004. I had already dog-eared my copy of her first collection of essays, Riverwalking: Reflections on Moving Water, when she came through town to read from her next book, Holdfast: At Home in the Natural World. After the reading I stayed so long asking questions that she invited me to join her philosophy of nature class for a weeklong trip. That September I camped with a dozen college students half my age by one of Oregon’s pristine Cascade Lakes. We gathered beneath the forest canopy to discuss the three questions Moore poses to all her students: What is nature? What is the relation of humans to the rest of the natural world? And how, then, shall we live? She sent us to seek answers among the ponderosa pines, in rowboats illuminated by starlight, and in frigid wetlands that sometimes swallowed us to our waists.