““Thus, to give an obvious instance, if I have once enjoyed the cool shade of a tree, and been lulled into a deep repose by the sound of a brook running at its feet, I am sure that wherever I can find a tree and a brook, I can enjoy the same pleasure again. Hence, when I imagine these objects, I can easily form a mystic personification of the friendly power that inhabits them, Dryad or Naiad, offering its cool fountain or its tempting shade. Hence the origin of the Grecian mythology.””
