Nietzsche:  Then, suddenly, friend, one turned into two

      Here I sat, waiting—not for anything—
Beyond Good and Evil, fancying

      Now light, now shadows, all a game,
All lake, all noon, all time without all aim.
Then, suddenly, friend, one turned into two—
And Zarathustra walked into my view.

• Friedrich Wilehlm Nietzsche, Sils Maria, The Gay Science (1882)