While neither of the authors is a philosopher (Rushforth is a botanist, Abbott a literary critic), in the course of peripatetic conversations they both turn to philosophy (as they do to poetry and art and science) for answers and for good questions.
Chapter titles are one indication of the topics under discussion: This is True Worship, Ecstatic Phenomenon, Jesus is the Answer, As Common as Paradox, As Odd as Love, Transcendental Balance, God Stories.
Epistemology is a constant concern:
“You’ve stumbled onto something controversial and interesting here,” Sam says. “It’s a classic disagreement between the lumpers (me included) and the splitters. Your second guide [with a larger number of species] was written by splitters and your first by lumpers.”
“I bought those guides,” I tell Sam, “expecting scientific facts. Instead, I get judgments, assessments, interpretations built on biases. ‘Truth,’ Nietzsche wrote, ‘is a mobile army of metaphors.’ I’m fifty years old and have known this for decades. Now I know it again.”
Human interaction with nature is a related question:
Sam’s standing form, silhouetted against the valley below, reminds me of early nineteenth-century paintings by Caspar David Friedrich. Responding to the new sense among German Romantics for the importance of the subject as it relates to objects of perception, Friedrich painted human figures from behind, their gazes turned to nature. “Nature,” Friedrich’s contemporary Schelling wrote, “is visible spirit, spirit is invisible nature.”
There are questions of aesthetics:“
Getting dark. Mountain hanging over us. Wind whipping up. We’re insignificant here.” “Sam, I don’t want to put words between us and the experience, but your response bears out Kant’s theory of the sublime. Nature overwhelms us with sheer size or power, then reason moves us past fear to a fine mixed pleasure.”“No shit,” Sam agrees thoughtfully.
Theology haunts the authors, although neither is a believer:
“Stanley Hauerwas claims that only ‘god stories’ have the power to inspire commitment, only stories that start ‘In the beginning...’ I pressed him on the issue, claiming that plenty of atheists with no belief in any sort of divine creation live strongly committed lives.”
“What did he answer?” Sam yells back from high on the hill.
“He’s a hell of a smart guy,” I answer, “so I’m not sure exactly what he said. I think I partly misunderstood his original point, and I think he said that like you and me, he sees human existence as absolutely contingent. But that god stuff confused the issue for me. I think he underestimates the commitment potential of stories that end with death!”
In short, as the authors converse about family and friendship and wilderness and loss and botany and mountain bikes and aging and sex and meaning, they have no recourse but to turn to philosophy now and then.