We boast of our system of education, but why stop at schoolmasters and schoolhouses? We are all schoolmasters, and our schoolhouse is the universe. To attend chiefly to the desk or schoolhouse while we neglect the scenery in which it is placed is absurd. If we do not look out we shall find our find schoolhouse standing in a cow-yard at last.
Henry David Thoreau, Joseph O. Valentine, Thoreau Society (2001). “Thoreau on Land: Nature's Canvas”, p.88, Houghton Mifflin Harcourt