"A lot of what you've been teaching me sometimes seems kind of useless. Like that kneestem you've got—I mean, it doesn't have anything to do with magic. It's just a weed. You said yourself it's worthless."Of course, I'm thinking of this in relation to a lot of issues that have nothing to do with the obvious application, such as our environment. It's a very Catholic way of looking at the world.
"It is worthless to us and to animals, having no value either as medicine or as food," Ingold agreed, turning the dry wisp in his mittened fingers. "But we ourselves are useless to other forms of life—except, I might point out, as sustenance to the Dark Ones. Kneestem, like you and me, exists for its own sake, and we must take that into account in all our dealings with the world that we hold in common with it.
Barbara Hambly, The Walls of Air