Quotes about doubt
page 20

Am wenigsten widerstehen kann ich dem Zweifel. Ich bezweifle alles, selbst meinen Zweifel. Ich glaube wenig und auch das nicht ganz. Skepsis ist für mich keine der «schönen Künste », sondern Teil meiner Existenz.
deschner.info http://www.deschner.info/de/person/zitate.htm

“Self-doubt, which is the artist’s bitterest enemy.”
Source: The Moon and Sixpence (1919), Ch. 43, p. 153

"Two dogmas of Empiricism", p. 26
From a Logical Point of View: Nine Logico-Philosophical Essays (1953)

Source: Attributed, Dictionary of Burning Words of Brilliant Writers (1895), P. 265.

The Freethinker (1970), G.W. Foote & Company, Volume 90, p. 147.
Date unknown

“Doubt is the offspring of knowledge: the savage never doubts at all.”
Source: The Martyrdom of Man (1872), Chapter II, "Religion", p. 189.

Session 45, Page 21
The Early Sessions: Sessions 1-42, 1997, The Early Sessions: Book 2

Tennessee v. Garner, 471 U.S. 1 (1985).

“We may eliminate death someday but I doubt if we’ll ever eliminate taxes.”
Source: I Will Fear No Evil (1970), Chapter 24, p. 406

“I doubt there’s ever been a true thing said on Fox. Maybe the weather report, maybe not.”
Ruminator Magazine interview with Susannah McNeely (August/September 2005).

Review http://www.rogerebert.com/reviews/saving-silverman-2001 of Saving Silverman (9 February 2001)
Reviews, Half-star reviews

" Catholic priest says that Hawking, while smart, didn’t solve the biggest questions of the universe https://whyevolutionistrue.wordpress.com/2018/03/22/catholic-priest-says-that-hawking-while-smart-didnt-solve-the-biggest-questions-of-the-universe/" March 22, 2018

"The Farmer as a Conservationist" [1939]; Published in The River of the Mother of God and Other Essays by Aldo Leopold, Susan L. Flader and J. Baird Callicott (eds.) 1991, p. 259.
1930s
Ludwig Wittgenstein: A Memoir, 1958

“True science teaches us to doubt and to abstain from ignorance.”
Bulletin of New York Academy of Medicine, Vol. IV (1928)

“I greet you, my educated fellow bourgeois, whose interests and whose doubts I share.”
Source: Enemies of Promise (1938), Part 1: Predicament, Ch. 1: The Next Ten Years (p. 5)

Mont Saint Michel and Chartres (1904)
"Non-Overlapping Magisteria", p. 270
Leonardo's Mountain of Clams and the Diet of Worms (1998)

Source: Barbarism with a Human Face (1977), p. ix

“Conservatism is the policy of making no changes and consulting your grandmother when in doubt.”
Attributed by Raymond B. Fosdick in Report of the Woodrow Wilson Foundation, 1963, p. 49 http://books.google.com/books?id=EqE8AAAAIAAJ&q=%22consulting+your+grandmother+when+in+doubt%22&dq=%22consulting+your+grandmother+when+in+doubt%22&hl=en&ei=fJ-HTJ33MYL58AaTqZyOAg&sa=X&oi=book_result&ct=result&resnum=3&ved=0CDkQ6AEwAg
1910s

The Reappearance of the Second Coming and the Completed Testament Era 1993-01-10 Belvedere International Training Center http://www.unification.net/pr-mes/pr-mes-2.html

After an incident with Michael Scotto, in Washington, D.C. (28 January 2014) http://www.politico.com/story/2014/01/michael-grimm-michael-scotto-reporter-102785.html.
2010s
Introduction.
The Papers of Samuel Marchbanks (1985)
[from a letter to the deputies in Congress representing the Southern Provinces, 1774 or 1775, appended to "Reminiscences"]
"Reminiscences of an American Loyalist" (first published serially in "Notes and Queries", 1874-)
Quote of Kline in an interview (March 1960) with David Sylvester, edited for broadcasting by the BBC first published in 'Living Arts', Spring 1963; as cited in Interviews with American Artists, David Sylvester; Chatto & Windus, London 2001, pp. 61-62
1960's
The Ayodhya temple-mosque dispute: Focus on Muslim sources (1993)

In the perl man page.
Documentation

Populus Vult
The Note-Books of Samuel Butler (1912), Part XII - The Enfant Terrible of Literature

Misattributed to Tryon Edwards by a number of websites, thinkexist.com and quoteland.com among others. This quote does appear on p. 23 of Edwards' compilation, A Dictionary of Thoughts; however, it is clearly identified there as a quote by Hugh Blair, the Scottish author and preacher.
A genuine Tryon Edwards quote on the subject of anxiety appears above in the Sourced section ( from p. 22 of A Dictionary of Thoughts. )
Misattributed

““I frankly doubt that.”
“Ah. That is your privilege. But doubt doesn’t alter fact, sir.””
Book 2, Chapter 2 (p. 124)
Downbelow Station (1981)
"A View of the Causes and Consequences of the American Revolution" (London, Robinson, 1797)

Original quote from The Democratic Speaker's Hand-Book (1868), by Matthew Carey, p. 33. Often paraphrased as "If I thought this war was to abolish slavery, I would resign my commission and offer my sword to the other side".
Misattributed

Source: The Autobiography of Francis Place: 1771-1854, 1972, p. 7; Cited in: Jeremy Wickins. " An Overview of Francis Place's Life, 1771-1854 http://www.historyhome.co.uk/people/place2.htm," historyhome.co.uk, last edited 12 january 2016.

1950s, Rediscovering Lost Values (1954)

Examples of self-translation (c. 2004), Quotes - Zitate - Citations - Citazioni

From a Logical Point of View: Nine Logico-Philosophical Essays (1953)

Impressions around March 1911
Sydpolen (The South Pole) (1912)
February 26, 1964, page 47.
Official Report of Proceedings of the Hong Kong Legislative Council

Speech to the National Union of Conservative and Constitutional Associations in St. James's Hall, London (15 May 1886), quoted in The Times (17 May 1886), p. 6
1880s

As quoted in "'Never Happier in My Life' Ruth Tells Grantland Rice; Babe Is Inspired by Challenge of National League Pitchers—Legs Feel Great" by Grantland Rice, in The Boston Globe (March 26, 1935), p. 21

1960s, I am Prepared to Die (1964)

ABC 20/20 interview 2004 http://www.guardian.co.uk/music/2004/oct/31/usa.religion

“So a lioness that has newly whelped, beset by Numidian hunters in her cruel den, stands upright over her young, gnashing her teeth in grim and piteous wise, her mind in doubt; she could disrupt the groups and break their weapons with her bite, but love for her offspring binds her cruel heart and from the midst of her fury she looks round at her cubs.”
Ut lea, quam saeuo fetam pressere cubili
venantes Numidae, natos erecta superstat,
mente sub incerta torvum ac miserabile frendens;
illa quidem turbare globos et frangere morsu
tela queat, sed prolis amor crudelia vincit
pectora, et a media catulos circumspicit ira.
Source: Thebaid, Book X, Line 414

Quotes 2000s, 2006, Discussion with Robert Trivers, 2006

Cheers.
Speech to Glasgow University (12 June 1908), reported in The Times (13 June 1908), p. 12.

Speech at the opening of the Reading and Recreation Rooms erected by the Saltney Literary Institute at Saltney in Chesire (26 October 1889), as quoted in "Mr. Gladstone On The Working Classes" in The Times (28 October 1889), p. 8
1880s

Source: An Essay on The Principle of Population (First Edition 1798, unrevised), Chapter V, paragraph 13, lines 1-3
"Sources for Alexander the Great: An Analysis of Plutarch's 'Life' and Arrian's 'Anabasis Alexandrou'", p.5, Cambridge Classical Studies

No. 1, volume v, p. 286
Letters On a Regicide Peace (1796)

Former Australia wicketkeeper Adam Gilchrist has called Kumar Sangakkara a terrific player, quoted on sports.ndtv, "Kumar Sangakkara Was a Terrific Player, Says Adam Gilchrist" http://sports.ndtv.com/sri-lanka-vs-india-2015/news/247481-kumar-sangakkara-was-a-terrific-player-says-adam-gilchrist, August 24, 2015.
About
Preface, pp. viii-ix.
The Revival of Aristocracy (1906)

Letter to Albert Gallatin (13 December 1803) http://etext.virginia.edu/jefferson/biog/lj34.htm ME 10:437 : The Writings of Thomas Jefferson "Memorial Edition" (20 Vols., 1903-04) edited by Andrew A. Lipscomb and Albert Ellery Bergh, Vol. 10, p. 437
1800s, First Presidential Administration (1801–1805)
From the Song Dynasty

The Cornerstone Speech (1861)

Cowan v. Duke of Buccleuch (1876), L. R. 2 Ap. Ca. 355.

Allinson v. General Council of Medical Education and Registration (1894), L. R. [1894], 1 Q. B. p. 758.

Shri K. R. Narayanan President of India in Conversation with N. Ram on Doordarshan and All India Radio

Source: Historia Calamitatum (c. 1132), Ch. XV

“Who never doubted never half believed
Where doubt there truth is—'t is her shadow.”
Scene V, A Country Town; comparable to Alfred, Lord Tennyson "There lives more faith in honest doubt / Believe me, than in half the creeds."
Festus (1839)

Address to the Knights of Columbus (5 August 1992)

Harijan (22 June 1940), after Nazi victories resulting in the occupation of France.
1940s

“An obnoxious child.”
Source: The Tales of Alvin Maker, Seventh Son (1987), Chapter 13.

The Duchess of Cornwall during a speech for the launch of British Food Fortnight in London
A speech by HRH The Duchess of Cornwall to mark the launch of British Food Fortnight, Westminster Cathedral, London 22 April 2010 http://www.princeofwales.gov.uk/media/speeches/speech-hrh-the-duchess-of-cornwall-mark-the-launch-of-british-food-fortnight

Letter to Lord Grenville (9 November 1810), quoted in Rory Muir, Britain and the Defeat of Napoleon, 1807-1815 (Yale University Press, 1996), pp. 136-137.
1810s
Source: Just a Theory: Exploring the Nature of Science (2005), Chapter 3, “Words Scientists Don’t Use: At Least Not the Way You Do” (p. 46)
Source: The Frontiers of Meaning: Three Informal Lectures on Music (1994), Ch. 1 : The Frontiers of Nonsense

2010s, 2015, Remarks at the SMU 100th Spring Commencement (May 2015)

Dissenting Kelo v. New London http://caselaw.lp.findlaw.com/cgi-bin/getcase.pl?court=US&navby=case&vol=000&invol=04-108.
2000s, Kelo v. New London (2005)

Discourse no. 3; vol. 1, pp. 70-71.
Discourses on Art

Bush press secretary Scott McClellan, What Happened http://web.archive.org/web/20080529050110/http://www.ajc.com/meetro/content/news/stories/2008/05/27/mcclellanbook_0527.html

p, 125
"On the Harmony of Theory and Practice in Mechanics" (Jan. 3, 1856)

Source: Problems In Genetics (1913), p. 10

Reported in Josiah Hotchkiss Gilbert, Dictionary of Burning Words of Brilliant Writers (1895), p. 444.

Speech to the annual conference of the University Labour Federation in Nottingham (6 January 1934), quoted in The Times (8 January 1934), p. 14.

Radio and Television Report to the Nation on the Situation at the University of Mississippi (30 September 1962) http://www.jfklibrary.org/Research/Ready-Reference/JFK-Speeches/Radio-and-Television-Report-to-the-Nation-on-the-Situation-at-the-University-of-Mississippi.aspx
1962

“Doubt not a woman's hardihood; no danger is too great for wedded love to face.”
Crede vigori
femineo. Castum haud superat labor ullus amorem.
Book III, lines 112–113
Punica