All The Running You Can Do

Now, here you see, it takes all the running you can do, to keep in the same place.  If you want to get somewhere else, you must run at least twice as fast as that!

-- Lewis Carroll (1832-1898), Through the Looking-Glass, chapter 2. -- Logical Nonsense: The Works of Lewis Carroll, ed. Philip C. Blackburn and Lionel White, p. 177 (1934), first published in 1872