It will demand your knowledge: the kind of knowledge that’s experiential, the kind of knowledge that comes with study. Know it—name it—and it will reward you only with more layers of detail, more frustrating revelations of your own ignorance. A deep terrain is a life’s work. It will beguile, nourish, and sustain you through decades, only to finally prove that you, too, are ephemeral compared to the rocks and the trees.