Suppose someone has frequently flown in his dreams and finally becomes conscious of a power and an art of flying just as soon as he starts dreaming, as though it were his privilege, and also his most personal and enviable happiness: one who believes he can realize every sort of curve and angle with the lightest impulse, who knows the feeling of a certain divine frivolity, an "upwards" without tension or duress, a "downwards" without condescension and humiliation—without gravity! How could a man who enjoyed such dream-experiences and dream-habits fail to discover in the end that the word "happiness" was differently colored and defined in his waking hours as well? How could he fail to—desire happiness differently?
Friedrich Nietzsche (1844–1900), German philosopher, classical scholar, critic of culture. Friedrich Nietzsche, Sämtliche Werke: Kritische Studienausgabe, vol. 5, pp. 114-115, eds. Giorgio Colli and Mazzino Montinari, Berlin, de Gruyter (1980). Beyond Good and Evil, "Fifth Part: Natural History of Morals," section 193 (1886).