I fly in dreams, I know it is my privilege, I do not recall a single situation in dreams when I was unable to fly. To execute every sort of curve and angle with a light impulse, a flying mathematics—that is so distinct a happiness that it has permanently suffused my basic sense of happiness.
Friedrich Nietzsche (1844–1900), German philosopher, classical scholar, critic of culture. Friedrich Nietzsche, Sämtliche Werke: Kritische Studienausgabe, vol. 9, p. 655, selection 15, eds. Giorgio Colli and Mazzino Montinari, Berlin, de Gruyter (1980). Unpublished fragments dating to Fall 1881.