“Living artificially in towns, we are sickly, and never come to know ourselves.”
John Muir (1838–1914) Scottish-born American naturalist and author
" Explorations in the Great Tuolumne Cañon http://books.google.com/books?id=ZikGAQAAIAAJ&pg=P139", Overland Monthly, volume XI, number 2 (August 1873) pages 139-147 (at page 146); modified and reprinted in John of the Mountains (1938), page 77 <br class="br">1870s