“As they listened, they began to understand the lives of the Forest, apart from themselves, indeed to feel themselves as the strangers where all other things were at home. […] Tom’s words laid bare the hearts of trees and their thoughts, which were dark and strange, and filled with a hatred of things that go free upon the earth, gnawing, biting, breaking, hacking, burning: destroyers and usurpers.
It was not called the Old Forest without reason, for it was indeed ancient, a survivor of vast forgotten woods; and in there lived yet, ageing no quicker than the hills, the fathers of the fathers of trees, remembering times when they were lords. The countless years had filled them with pride and rooted wisdom, and with malice.”
Tolkien, J. (2014) The Fellowship of the Ring [The Lord of the Rings, part 1, ed. 60]. New York: HarperCollins Publishers.