Quotes about doubt
page 3

“If there were any doubts, I think that they should be put to bed.”
Talking about the Apple Watch,
bloomberg.com http://www.bloomberg.com/news/features/2014-09-17/tim-cook-interview-the-iphone-6-the-apple-watch-and-remaking-a-companys-culture-i077npsy

Speech in the House of Lords on the state of agriculture (28 March 1879), reported in The Times (29 March 1879), p. 8.
1870s

I, xxi, 41. Modern translation by J.H. Taylor
De Genesi ad Litteram

Source: Autobiography of Mark Twain, Vol. 3 (2015), p. 288

Listen Back To A 1990 Interview With Actor Christopher Lee http://www.npr.org/2015/06/12/413936419/listen-back-to-a-1990-interview-with-actor-christopher-lee (1990)

From the poem "To Sayf Al-Dawla"
Here 'Sword never sheathed' refers to 'Sayf Al-Dawla', whose name is a laqab meaning 'Sword of the Dynasty'. http://samarmedia.tv/en/video/295/al-mutanabi-arabic-poem-with-english/

2006, 2006 International Qods Conference address

Part I, Ch. 3: Lenin, Trotsky and Gorky
1920s, The Practice and Theory of Bolshevism (1920)

Majlisi, Bihārul Anwār, vol.78, p. 373
General

As quoted in Fortune (18 September 1995)
1990s

“Epilogue”, from De-triumphant March (1960)

“I must plunge into the water of doubt again and again.”
Source: 1930s-1951, Philosophical Occasions 1912-1951 (1993), Ch. 7 : Remarks on Frazer's Golden Bough, p. 119

Christmas Through Your Eyes
2007, 2008

Madison's notes (31 May 1787)
1780s, The Debates in the Federal Convention (1787)

1980s, First term of office (1981–1985), Abortion and the Conscience of the Nation (1983)

“In either case the orator should bear clearly in mind throughout his whole speech what the fiction is to which he has committed himself, since we are apt to forget our falsehoods, and there is no doubt about the truth of the proverb that a liar should have a good memory.”
Vtrubique autem orator meminisse debebit actione tota quid finxerit, quoniam solent excidere quae falsa sunt: verumque est illud quod vulgo dicitur, mendacem memorem esse oportere.
Book IV, Chapter II, 91; translation by H. E. Butler
Compare: "Liars ought to have good memories", Algernon Sidney, Discourses on Government, chapter ii, section xv.
Alternate translation for "solent excidere quae falsa sunt": False things tend to be forgotten
De Institutione Oratoria (c. 95 AD)

Remarks by the President at LBJ Presidential Library Civil Rights Summit at Lyndon B. Johnson Presidential Library in Austin, Texas on April 10, 2014. http://www.whitehouse.gov/the-press-office/2014/04/10/remarks-president-lbj-presidential-library-civil-rights-summit
2014

“In necessary things, unity; in doubtful things, liberty; in all things, charity (love).”
In necessariis unitas, In dubiis libertas, In omnibus autem caritas.
The first known occurence of such an expression is as "Omnesque mutuam amplecteremur unitatem in necessariis, in non necessariis libertatem, in omnibus caritatem" in De Republica Ecclesiastica by Marco Antonio de Dominis, Pars I. London (1617), lib. 4 cap. 8 p. 676 (penultimate sentence) books.google http://books.google.de/books?id=QcVFAAAAcAAJ&pg=PA676, cf. liberlocorumcommunium http://liberlocorumcommunium.blogspot.com/2010/03/in-necessariis-unitas-in-non.html.
Misattributed

Evangelicæ Historiæ: Quadripartita Monas Sive Harmonia Quatuor Evangelistarum ("Harmonization of the Gospels") (1592), dedicatory letter. Quoted in Jean Van Raemdonck, Gerard Mercator: sa vie et ses oeuvres (1869), p. 25, footnote 2 http://books.google.com/books?id=18NNAAAAcAAJ&pg=PA25

Leo Strauss, Farabi's Plato http://contemporarythinkers.org/leo-strauss/essay/farabis-plato/, Louis Ginzberg Jubilee Volume, American Academy for Jewish Research, 1945. Reprinted, revised and abbreviated, in Persecution and the Art of Writing.

6.51
1920s, Tractatus Logico-Philosophicus (1922)

Speech at banquet of the National Union of Conservative and Constitutional Associations, Crystal Palace, London (24 June 1872), cited in "Mr. Disraeli at Sydenham," The Times (25 June 1872), p. 8.
1870s

Source: 1920s, Sceptical Essays (1928), Ch. 12: Free Thought and Official Propaganda

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 148.
Source: The Christian Agnostic (1965), p.227 [ellipsis added]
Theatrum Chemicum Volume 1 phil. med.

“You know, my faith is one that admits some doubt.”
ABC's This Week With George Stephanopoulos (15 August 2004)
2004

The Magnificent Defeat (1966)

Eight or Nine Wise Words About Letter-Writing (1890)

"Collins: Why this scientist believes in God" http://www.cnn.com/2007/US/04/03/collins.commentary/index.html, editorial, CNN (April 6, 2007)

At the program Câmera Aberta at Band on 23 May 1999 about what he would do on the first day as president of Brazil. O dia que Bolsonaro quis matar FHC, sonegar impostos e declarar guerra civil http://www.gazetadopovo.com.br/politica/republica/o-dia-que-bolsonaro-quis-matar-fhc-sonegar-impostos-e-declarar-guerra-civil-8mtm0u0so6pk88kqnqo0n1l69. Gazeta do Povo (10 October 2017).

“No ally or adversary should ever doubt our strength and our resolve.”
2016, Convention (August 2016)

Source: Interregional and international trade. (1933), p. 307; As cited in: Irwin, Douglas A. "Ohlin Versus Stolper-Samuelson." No. w7641. National bureau of economic research, 2000. p. 4.

"Canada: 'A model for the world', in The Globe and Mail (2 February 2002)

Statement (April 1936), quoted in Anthony Adamthwaite, Grandeur and Misery: France's Bid for Power in Europe 1914-1940 (London: Arnold, 1995), p. 182.

“When in doubt, use brute force.”
Source: http://wiki.c2.com/?BruteForce
Quoted by Prince Philip, Duke of Edinburgh, at Colorado Outward Bound's 25th anniversary in 1987; as cited in Leadership the Outward Bound Way (2007), ISBN 159485033X.

Quoted in Notker's The Deeds of Charlemagne (translated 2008 by David Ganz)

Majlisi, Bihārul Anwār, vol.52, p. 113 ; Muhammad Kulayni, Usūl al-Kāfī, vol.1, p. 336 ; al-Tūsī, Kitāb al-Ghayba, p. 337.
Religious Wisdom

Ten best quotes: HH Sheikh Mohammed, http://www.arabianbusiness.com/photos/ten-best-quotes-hh-sheikh-mohammed-503777.html?img=0, Arabian Business.

As quoted in "Tesla Says Edison Was an Empiricist", The New York Times (19 Oct 1931), 25.

Ohlin (1924), quoted (and translated) in: Eli Filip Heckscher, Bertil Gotthard Ohlin, Henry Flam Heckscher-Ohlin trade theory, (1991), p. 76.
1920s

The Crisis No. I.
1770s, The American Crisis (1776–1783)

Source: 1910s, Our Knowledge of the External World (1914), p. 70

Sec. 377
The Gay Science (1882)

Speech on the 24th Anniversary of the Revolution http://www.youtube.com/watch?v=8IGbjPqFFvA (7 November 1941)
Stalin's speeches, writings and authorised interviews

Paris 1923
As quoted by Marius de Zayas, in 'The Arts', New York, May 1923
Quotes, 1920's, "Picasso Speaks," 1923

“Only the most uncritical minds are free from doubt.”
Source: A Sand County Almanac, 1949, "Conservation Esthetic", p. 165.

“Beliefs are what divide people. Doubt unites them.”
2000 Years of Disbelief : Famous People with the Courage to Doubt (1996) by James A. Haught

Dr. Martin Luther King Jr. National Memorial Groundbreaking Ceremony (13 November 2006)
2006

As quoted in The God-Man : The Life, Journeys and Work of Meher Baba with an Interpretation of His Silence and Spiritual Teaching (1964) by Charles Benjamin Purdom, p. 171.
General sources

“I have no patience for anybody that doubts me, none at all.”
1990s, Ed Gordon interview (1994)

2008, A More Perfect Union (March 2008)

Oration delivered at Daniel O'Connell celebration, Boston (6 August 1870), published in Wendell Phillips: The Agitator (1890) by William Carlos Martyn, p. 563
1870s

“When in doubt, tell the truth.”
Pudd'nhead Wilson's New Calendar, Ch. II
Not in the text, but added by many sources is the sentence: "It will confound your enemies and astound your friends." Compare this line to the advice attributed to Henry Wotton (1568 - 1639) to a young diplomat "to tell the truth, and so puzzle and confound his enemies." E.g., Vol 24, Encyclopedia Britannica of Arts, Sciences, and General Literature, page 721 https://books.google.com/books?id=_GlJAAAAYAAJ&pg=PA721&lpg=PA721&dq=truth+wotton+confound+advice&source=bl&ots=-cGk3UDLLj&sig=ltOR1xtI9WFic1JWKiFmIZ8Yce0&hl=en&sa=X&ved=0ahUKEwjVkZCsj-jRAhXCyFQKHTmsCkAQ6AEIODAG#v=onepage&q=truth%20wotton%20confound%20advice&f=false (9th Ed. 1894)
Following the Equator (1897)

“It's not doubt that drives people crazy, it's certainty that does.”
Un chagrin de passage (1994, A Fleeting Sorrow, translated 1995)

Letter to Gilbert Murray, April 3, 1902
1900s

“I make no doubt… that these rules are simple, artless, and natural.”
The Art of Persuasion

"An Interview with Bernard Malamud", in Leslie A. Field and Joyce W. Field (eds.) Bernard Malamud: A Collection of Critical Essays (London: Prentice-Hall, 1975) p. 11

“To me, the Bible is a book. Important, no doubt, but a book.”
Interview to the newspaper "O Globo", 2009.

Source: Striking Thoughts (2000), p. 15 - 16

29 September 1960 Sathya Sai Speaks v.1
Sathya Sai Geetha (Volume 1), Page 4/4 http://www.sathyasai.org/discour/sathyasaispeaks/volume01/sss01-31.pdf

Letter to General Armstrong (26 March 1781) http://www.greatseal.com/mottoes/coeptis.html, as quoted in The Religious Opinions and Character of Washington (1836) by Edward Charles McGuire, p. 122
1780s

“No doubt, there was peace after all this, but it was a peace stained with blood.”
Pacem sine dubio post haec, verum cruentam.
Book I, 10; Church-Brodribb translation
Annals (117)

1950s, The Russell-Einstein Manifesto (1955)

1920s, What I Believe (1925)

April 30, 1945, quoted in "Memoirs: Ten Years And Twenty Days" - Page 442 - by Grand Admiral Karl Doenitz - History - 1997.

To Captain John Morton, 1864. As quoted in May I Quote You, General Forrest? by Randall Bedwell.
1860s

Source: Survivals and New Arrivals (1929), Ch. IV The Main Opposition (iii) The "Modern" Mind

tahaँ basa basumati basu basumukhamukha
nigadita nigama sukarama dharamadhura ।
durita damana dukha śamana sukha gamana
parama kamana pada namana sakala sura ॥
bimala birati rati bhagati bharana bhala
bharama harana hari haraṣa harama pura ।
giridhara raghubara gharani janama mahi
tarani tanaya bhaya janaka janakapura ॥
Srisitaramakelikaumudi

Fletcher v. Peck, 10 U.S. (6 Cranch) 87, 128 (1810)

Frankfurt Book Fair speech (2003)

Letter to Morton Kelsey (1958) as quoted by Morton Kelsey, Myth, History & Faith: The Mysteries of Christian Myth & Imagination (1974) Ch.VIII

Sec. 325
The Gay Science (1882)