The major problems in the world are the result of the difference between how nature works and the way people think.
–Gregory Bateson, English anthropologist, social scientist, linguist, visual anthropologist, semiotician and cyberneticist whose work intersected that of many other fields.
When one tugs at a single thing in nature, he finds it attached to the rest of the world.
–John Muir, naturalist, author, and early advocate of preservation of wilderness in the United States.