Quotes about certainty
page 4

Five Essays on Liberty (2002), Two Concepts of Liberty (1958)

“Fireside happiness, to hours of ease
Blest with that charm, the certainty to please.”
Human Life (1819)

undated quotes, The Daily Practice of Painting, Writings (1962-1993)

Source: The Wine of Violence (1981), Chapter 19 (p. 234)

Source: The Subtle Art of Not Giving a F*ck (2016), Chapter 9, “...And Then You Die” (p. 207)
Act II
A Man for All Seasons (1960)

The Need for Transcendence in the Postmodern World (1994)
“There is no great danger to politics in the desire for certainty at any price.”
Source: In Defence Of Politics (Second Edition) – 1981, Chapter 5, A Defence Of Politics Against Technology, p. 92.

Quoted in New York Times (21 February 1960).
Letters and interviews

Section 7 : Spiritual Progress
Founding Address (1876), Life and Destiny (1913)

Learning to Fly: A Memoir of Hanging On and Letting Go (New York: Touchstone, 2015), pp. 83 https://books.google.it/books?id=IIDRCgAAQBAJ&pg=PA83-84.

Miscellaneous Works: Scientific Memoirs (1855) Vol. 1 https://books.google.com/books?id=-XAXAQAAMAAJ, ed. George Peacock & John Leitch, p. 249

Introduction
Popular Astronomy: A Series of Lectures Delivered at Ipswich (1868)

Christopher Hitchens vs. William Dembski, 18/11/2010 http://www.youtube.com/watch?v=ctuloBOYolE&t=22m46s
2010s, 2010

1880s, Reminiscences (1881)

2010s, 2013, Obama's war on global warming is economic suicide (2013)
Helen in A Trojan Ending (London: Constable, 1937)

Pages 13-14
(1945)
Source: The Rise of Endymion (1997), Chapter 10 (p. 166)

Quoted in "Memoirs" - Page 167 - by Andreĭ Andreevich Gromyko, Harold Shukman - 1990

Source: On the Study and Difficulties of Mathematics (1831), Ch. I.

Part Eleven “The Dream Season”, Chapter vi “Death Comes Home”, Section (p. 507)
(1987), BOOK THREE: OUT OF THE EMPTY QUARTER
Prokofiev’s piano sonatas : a guide for the listener and the performer (2008), Preface

A Description of Helioscopes, and Some Other Instruments https://books.google.com/books?id=KQtPAAAAcAAJ (1676)

“Certainty is usually a sign of pathology.”
Substance, Pressure, Beyond, Pulse in Matter, p. 210
Mystic Trudeau: The Fire and the Rose (2007)

Source: The Income Tax: Root of All Evil (1954), pp. 34-35
Laura Riding and Robert Graves from "Poetry and Politics", reprinted in The Common Asphodel (London: Hamish Hamilton, 1949)
Source: What is Political Philosophy (1959), p. 73

Cited in: L.P. Foch (1997) " Some Philosophical Influences on Ilya Prigogine's Statistical Mechanics https://www9.georgetown.edu/faculty/earleyj/papers/FOCH%20LP7.pdf", at georgetown.edu.
Order Out of Chaos: Man's New Dialogue with Nature (1984)
Can Love Last? (New York: W. W. Norton & Company, 2002), pp. 91-92
Source: The Christian Agnostic (1965), p.77-78, (Paul Tillich: The Shaking of the Foundations. 1963. Pelican Books. p. 164

Brock Chisholm (1946) The Psychiatry of Enduring Peace and Social Progress. p. 5

Speech in Omaha, Nebraska (8 September 1919), as recorded in Addresses of President Wilson (1919), p. 75 and in "The Public Papers of Woodrow Wilson (Authorized Edition) War and Peace: Presidential Messages, Addresses, and Public Papers (1917-1924) Volume II Page 36; Wilson later used this phrase in his address in Pueblo, Colorado, in what has been called his League of Nations Address (25 September 1919)[Note: this phrase is not in Wilson's address in Pueblo, Colorado (25 September 1919). He made a much softer statement making the inevitability of a future war without the League implicit rather than explicit.]
1910s

interview in Iconey http://www.iconeye.com/index.php?option=com_content&view=article&id=2715:rem-koolhaas--icon-013--june-2004, Icon 013, (June 2004)
Section 1.14
The Crosswicks Journal, A Circle of Quiet (1972)

Source: 1850s, An Investigation of the Laws of Thought (1854), p. 244; Cited in: Michael J. Katz (1986) Templets and the Explanation of Complex Patterns, p. 123
Source: Liber Kaos (1992), p. 75

The Education of Henry Adams (1907)

Page 236.
The Revolution Will Be Digitised: Dispatches From the Information War, 1st Edition

Page 17
Other writings, The Growth of the Law (1924)

“State of the Art” (p. 136)
Short fiction, The State of the Art (1991)

Source: The Mind and the Brain, 1907, p. 17

after 1920, The Epic, From immobile form to mobile form (1925)

Quote in Neue Schweizer Rundschau, 1929, p. 172 (Van Doesburg); as quoted in De Stijl 1917-1931 - The Dutch Contribution to Modern Art http://www.dbnl.org/tekst/jaff001stij01_01/jaff001stij01_01_0003.php, J.M. Meulenhoff, Amsterdam, 1956, p. 17
Van Doesburg is looking back on the starting years of De Stijl-movement
1926 – 1931
The activity of telling oneself and the world "I am still alive."
On Kawara, "1970 Telegram," as cited in: " On Kawara Today http://greg.org/archive/2014/07/10/on_kawara_today.html," By greg on July 10, 2014 8:27 PM.

Letter to George Washington (November 1779)

The Fortnightly Review, vol. 25 (1876) p. 859

“Certainty, not data, is knowledge.”
The Factors (1967).

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 284.

Combe v. Edwards (1878), L. R. 3 P. D. 142.

Source: The Yiddish Policemen’s Union (2007), Chapter 23

Source: The Black Swan: The Impact of the Highly Improbable (2007), p. 128

“The only certainty is that nothing is certain.”
Fuller version: This series of instances entangles unforeseeing mortality, so that among these things but one thing is in the least certainthat nothing certain exists, and that nothing is more pitiable, or more presnmptuous, than man! In Latin: Quae singula inprovidam mortalitatem involvunt, solum ut inter ista vel certu sit nihil esse certi nec quicquam miserius homine aut superbius.
Book II, sec. 5.
Naturalis Historia

Introduction à l'Étude de la Médecine Expérimentale (1865)

Concerning Operation Market Garden in his autobiography, 'The Memoirs of Field Marshal Montgomery' (1958)

from an unnamed Swedish radio program, quoted in Mirror.co.uk, "Blix Blasts 'Illegal' US War on Iraq", August 7, 2003 http://www.mirror.co.uk/news/allnews/content_objectid=13263825_method=full_siteid=50143_headline=-BLIX-BLASTS--ILLEGAL--US-WAR-ON-IRAQ-name_page.html

August, 1917
India's Rebirth
"Back to the Heady Future", review of The Encyclopedia of Science Fiction, edited by John Clute and Peter Nicholls, originally published in the [London] Daily Telegraph (1993)
A User's Guide to the Millennium (1996)

Page 53
Publications, The Shah's Story (1980), On world leaders and statesmen
“Certainties are arrived at only on foot.”
Las certidumbres sólo se alcanzan con los pies.
Voces (1943)
Source: The Passionate Life (1983), p. 22

As quoted in Carl Friedrich Gauss: Titan of Science (1955) by Guy Waldo Dunnington. p. 306

Source: 1960s-1970s, "Rational decision making in business organizations", Nobel Memorial Lecture 1978, p. 498; As cited in: Arjang A. Assad, Saul I. Gass (2011) Profiles in Operations Research: Pioneers and Innovators. p. 260-1.
I suppose that apples might start to rise tomorrow, but the possibility does not merit equal time in physics classrooms.
"Evolution as Fact and Theory", pp. 254–55 (originally appeared in Discover Magazine, May 1981)
Hen's Teeth and Horse's Toes (1983)
Ikujiro Nonaka (1991), "The Knowledge-Creating Company", Harvard Business Review 69 (6 Nov-Dec): 96–104

Source: Quotes dated, Dangerous Corner', 1929, p. 17-18

Source: Simone Weil : An Anthology (1986), Human Personality (1943), p. 71
The Whig Interpretation of History (1931)

Apology for the Abbé de Prades (1752)