“But what, Phaedrus, is the contrary of a dream if not some other dream?… A dream of vigilance and tension dreamt by Reason herself!—And what would such a Reason dream?—If a Reason were to dream—a Reason hard, erect, eyes armed, mouth closed, as though mistress of her lips—would not the dream she dreamt be what we see now—this world of exact forces and studied illusions?—A dream, a dream, but a dream interpenetrated with symmetries, all order, acts and sequences!”

Letter to British Prime Minister Ramsay MacDonald (25 February 1924), quoted in Anthony Adamthwaite, Grandeur and Misery: France's Bid for Power in Europe 1914-1940 (London: Arnold, 1995), p. 101.

Social Dreaming of the Frin in David G. Hartwell (ed.) Year's Best Fantasy 3, p. 172 (Originally published at The Magazine of Fantasy & Science Fiction https://en.wikipedia.org/wiki/The_Magazine_of_Fantasy_%26_Science_Fiction October/November 2002)

"The Superstitions of Fred Anneday, Annday, Anday; a Novel of Real Life" (1935)
How Writing Is Written: Previously Uncollected Writings, vol.II (1974)

Ibid., p. 320
The Book of Disquiet
Original: E assim como sonho, raciocino se quiser, porque isso é apenas uma outra espécia de sonho.

¿Qué es la vida? Un frenesí.
¿Qué es la vida? Una ilusión,
una sombra, una ficción,
y el mayor bien es pequeño;
que toda la vida es sueño,
y los sueños, sueños son.
Variant:
What is this life? A frenzy, an illusion,
A shadow, a delirium, a fiction.
The greatest good's but little, and this life
Is but a dream, and dreams are only dreams.
(trans. Roy Campbell)
Segismundo, Act II, l. 1195.
La vida es sueño (Life is a Dream)

Source: The Dream of a Ridiculous Man (1877), V
Context: A dream! What is a dream? And is not our life a dream? I will say more. Suppose that this paradise will never come to pass (that I understand), yet I shall go on preaching it. And yet how simple it is: in one day, in one hour everything could be arranged at once! The chief thing is to love others like yourself, that's the chief thing, and that's everything; nothing else is wanted — you will find out at once how to arrange it all. And yet it's an old truth which has been told and retold a billion times — but it has not formed part of our lives! The consciousness of life is higher than life, the knowledge of the laws of happiness is higher than happiness — that is what one must contend against. And I shall. If only everyone wants it, it can be arranged at once.

Source: The White Stone (1905), Ch. VI, p. 237

Have Your Loved Ones Spayed and Neutered (2004)