Terry Brooks said this quote

“ The Elven people believe that preservation of the land and all that lives and grows upon it, plant and animal alike, is a moral responsibility. They have always held this belief foremost in their conduct as creatures of the earth. In the old world, they devoted the whole of their lives to caring for the woodlands and forests in which they lived, cultivating its various forms of vegetation, sheltering the animals that it harbored. Of course, they had little else to concern them in those days, for they were an isolated and reclusive people. All that has changed now, but they still maintain a belief in their moral responsibility for their world. Every Elf is expected to spend a portion of his life giving back to the land something of what he has taken out of it. By that I mean every Elf is expected to devote a part of his life to working with the land–to repairing damage it may have suffered through misuse or neglect, to caring for its animals and other wildlife, to caring for its trees and smaller plants where the need to do so is found. ”