“Everything meant something, still, some meanings were revealed sooner than others. And that some were seemingly never revealed in no way disproved the fact.”

Las sombras: unas ocultan, otras descubren.
Voces (1943)

Signposts to Elsewhere (2008)

At an interview with Stephen Colbert at Montclair Kimberley Academy on January 29th, 2010.
2010s

Source: The Wisest of All Times is Now! p. 8. (2021)

"Is There a God?" http://www.personal.kent.edu/~rmuhamma/Philosophy/RBwritings/isThereGod.htm (1952), commissioned by Illustrated Magazine but not published until its appearance in The Collected Papers of Bertrand Russell, Volume 11: Last Philosophical Testament, 1943-68, ed. John G. Slater and Peter Köllner (London: Routledge, 1997), pp. 543-48
1950s
Context: Many orthodox people speak as though it were the business of sceptics to disprove received dogmas rather than of dogmatists to prove them. This is, of course, a mistake. If I were to suggest that between the Earth and Mars there is a china teapot revolving about the sun in an elliptical orbit, nobody would be able to disprove my assertion provided I were careful to add that the teapot is too small to be revealed even by our most powerful telescopes. But if I were to go on to say that, since my assertion cannot be disproved, it is intolerable presumption on the part of human reason to doubt it, I should rightly be thought to be talking nonsense. If, however, the existence of such a teapot were affirmed in ancient books, taught as the sacred truth every Sunday, and instilled into the minds of children at school, hesitation to believe in its existence would become a mark of eccentricity and entitle the doubter to the attentions of the psychiatrist in an enlightened age or of the Inquisitor in an earlier time.

The Labours of Hercules (1967)
Context: Words had become to him a means of obscuring facts — not of revealing them. He was an adept in the art of the useful phrase — that is to say the phrase that falls soothingly on the ear and is quite empty of meaning.

Source: Enchanted

Book 5, as cited in Frank Teichmann (tr. Jon McAlice), "The Emergence of the Idea of Evolution in the Time of Goethe" http://www.waldorfresearchinstitute.org/pdf/BAIdeaEvolTeich.pdf
Ideen zur Philosophie der Geschichte der Menschheit (1784-91)

Persecution and the Art of Writing (1952), Introduction