• We reached the old wolf in time to watch a fierce green fire dying in her eyes. I realized then, and have known ever since, that there was something new to me in those eyes – something known only to her and to the mountain. I was young then, and full of trigger-itch; I thought that because fewer wolves meant more deer, that no wolves would mean hunters’ paradise. But after seeing the green fire die, I sensed that neither the wolf nor the mountain agreed with such a view.

    "A Sand County Almanac: And Sketches Here and There". Book by Aldo Leopold. Chapter "Arizona and New Mexico: Thinking Like a Mountain", p. 130-132, 1949.