Quotes about doubt
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“The worst enemy to creativity is self-doubt.”
Source: The Unabridged Journals of Sylvia Plath

“Perhaps the crescent moon smiles in doubt
at being told that it is a fragment
awaiting perfection.”
Source: Fireflies: A Collection of Proverbs, Aphorisms and Maxims

“[T]he longer you stay skeptical, doubtful, intellectually uncomfortable, the better it is for you.”


“When in doubt tell the truth. It will confound your enemies and astound your friends.”
“I love doubt in a woman. It's nearly as sexy as determination.”
Source: Filth

“Doubts are the ants in the pants of faith. They keep it awake and moving.”
Wishful Thinking: A Theological ABC (1973)
Context: If you don't have doubts you're either kidding yourself or asleep. Doubts are the ants in the pants of faith. They keep it awake and moving.

2008, Election victory speech (November 2008)

Bertrand Russell's Best: Silhouettes in Satire (1958), "On Religion".<!--originally taken from What is an Agnostic? (1953).-->
1950s
Context: I observe that a very large portion of the human race does not believe in God and suffers no visible punishment in consequence. And if there were a God, I think it very unlikely that he would have such an uneasy vanity as to be offended by those who doubt his existence.

“There can be no faith without doubt. No strength without temptation. (Rafael)”
Source: My Big Fat Supernatural Wedding

Helen Adams Keller (p. 60. Helen Keller's Journal: 1936-1937, Doubleday, Doran & company, inc., 1938)

I.597
Human, All Too Human (1878)
Context: No one talks more passionately about his rights than he who in the depths of his soul doubts whether he has any. By enlisting passion on his side he wants to stifle his reason and its doubts: thus he will acquire a good conscience and with it success among his fellow men.

“Focus more on your desire than on your doubt, and the dream will take care of itself.”

“When in doubt, shoot the wizard.”

“There is no doubt fiction makes a better job of the truth.”
Source: Under My Skin: Volume One of My Autobiography, to 1949

"The Tomb" - Written Jun 1917; first published in The Vagrant, No. 14 (March 1922)<!-- p. 50-64 -->
Fiction
Context: In relating the circumstances which have led to my confinement within this refuge for the demented, I am aware that my present position will create a natural doubt of the authenticity of my narrative. It is an unfortunate fact that the bulk of humanity is too limited in its mental vision to weigh with patience and intelligence those isolated phenomena, seen and felt only by a psychologically sensitive few, which lie outside its common experience. Men of broader intellect know that there is no sharp distinction betwixt the real and the unreal; that all things appear as they do only by virtue of the delicate individual physical and mental media through which we are made conscious of them; but the prosaic materialism of the majority condemns as madness the flashes of super-sight which penetrate the common veil of obvious empiricism.

Part I: Man and Nature, Ch. 1: Current Perplexities, pp. 4–5
1950s, New Hopes for a Changing World (1951)
Context: Consider MacArthur and his Republican supporters. So limited is his intelligence and his imagination that he is never puzzled for one moment. All we have to do is to go back to the days of the Opium War. After we have killed a sufficient number of millions of Chinese, the survivors among them will perceive our moral superiority and hail MacArthur as a saviour. But let us not be one-sided. Stalin, I should say, is equally simple- minded and equally out of date. He, too, believes that if his armies could occupy Britain and reduce us all to the economic level of Soviet peasants and the political level of convicts, we should hail him as a great deliverer and bless the day when we were freed from the shackles of democracy. One of the painful things about our time is that those who feel certainty are stupid, and those with any imagination and understanding are filled with doubt and indecision.

Source: The Cardturner: A Novel about a King, a Queen, and a Joker

“Tis better people think you a fool, then open your mouth and erase all doubt.”
Variously attributed to Lincoln, Elbert Hubbard, Mark Twain, Benjamin Franklin and Socrates
Misattributed
Variant: It is better to be silent and be thought a fool than to speak and remove all doubt.

“Sometimes I think it is my mission to bring faith to the faithless, and doubt to the faithful.”
Part I, Chapter 1.2, the mysterious stranger's words to Bob Shane
Lightning (1988)

“I'm sure Obama is an atheist, I’m sure Kennedy was an atheist, but I doubt if Pope Frank is.”
Interview with Bill Maher (2013) http://www.liveleak.com/view?i=d2b_1382908273

This Is My Story (1937)

In, p. 30.
Gulzarilal Nanda: A Life in the Service of the People

The Art of Persuasion

Sec. 2
The Gay Science (1882)

The Notebooks of Leonardo da Vinci (1883), XIX Philosophical Maxims. Morals. Polemics and Speculations.

From Interview to the author , in Osamu Tezuka, Jumping ; quoted in AA.VV., Osamu Tezuka: A Manga Biography , vol. 4, translated by Marta Fogato, Coconino Press, Bologna, 2001, p. 178. ISBN 8888063188
Address to Zenana Muslim League, at Curzon Hall of Dhaka, 23 March 1948[citation needed]

Excerpt from Beyond the Pale by Nicholas Mosley.

“Doubt is part of all religion. All the religious thinkers were doubters.”
The New York Times (3 December 1978)

Le doute n'est pas un état bien agréable, mais l'assurance est un état ridicule.
Ce qui révolte le plus dans le Système de la nature ( après la façon de faire des anguilles avec de la farine), c'est l'audace avec laquelle il décide qu'il n'y a point de Dieu , sans avoir seulement tenté d'en prouver l'impossibilité.
Letter to Frederick William, Prince of Prussia (28 November 1770). English: in S.G. Tallentyre (ed.), Voltaire in His Letters. New York : G.P. Putnam's Sons, 1919. p. 232. French: Au prince royal de prusse, le 28 novembre, in M. Palissot (ed.), Oeuvres de Voltaire: Lettres Choisies du Roi de Prusse et de M. de Voltaire, Tome II. Paris : Chez Baudoiun, 1802. p. 419
Citas

In a letter to the Duke Alfonso of Ferrara, From Venice, April 1, 1518; as quoted by J.A.Y. Crowe & G.B. Cavalcaselle in Titian his life and times - With some account ..., publisher John Murray, London, 1877, p. 181-82
1510-1540

Bernard Levin, "Uneasy Lies the Head", The Times, 23 January 1989.
About

Bk. 1, ch. 4. Translated by Robert B. Burke, in: Edward Grant (1974) Source Book in Medieval Science. Harvard University Press. p. 93
Opus Majus, c. 1267

1910s, The Progressives, Past and Present (1910)

Source: The Integration of the Personality (1939), p. 72

1860s, Letter to James C. Conkling (1863)

You are the Message : Getting What You Want by Being Who You Are (1989)

Von Foerster (1995) " Interview Heinz von Foerster http://www.stanford.edu/group/SHR/4-2/text/interviewvonf.html" S. Franchi, G. Güzeldere, and E. Minch (eds) in: Constructions of the Mind Volume 4, issue 2. 26 June 1995
1990s

Source: 1930s, Power: A New Social Analysis (1938), Ch. 2: Leaders and Followers

1850s, The House Divided speech (1858)

In [Jain, Manju, Narratives of Indian Cinema, http://books.google.com/books?id=ORE9TDOoU1IC&pg=PA22, 2009, Primus Books, 978-81-908918-4-4, 22]
Quote

2008, A More Perfect Union (March 2008)

Four Riddles, no. II
Rhyme? and Reason? (1883)

Confessions of a Twentieth-Century Pilgrim (1988)

Source: Sex, Art and American Culture : New Essays (1992), Junk Bonds and Corporate Raiders : Academe in the Hour of the Wolf, p. 185

On History (1904)
1900s