If the Creator were to bestow a new set of senses upon us, or slightly remodel the present ones, leaving all the rest of nature unchanged, we should never doubt we were in another world, and so in strict reality we should be, just as if all the world besides our senses were changed.
John Muir, Linnie Marsh Wolfe (1979). “John of the Mountains: The Unpublished Journals of John Muir”, p.12, Univ of Wisconsin Press
