Corbis Yosemite Falls in Yosemite National Park Chee-Onn Leong / iStockphoto The naturalist John Muir is ... quotes—"Climb the mountains and get their good tidings. Nature's peace will flow ...

John Muir was one of the earliest advocates of the national park idea, and its most eloquent ... his life with his "unconditional surrender" to nature. After working as a sheepherder in the ...