Quotes about requirement
page 15

Source: The Production of Security (1849), p. 40

1860s, What the Black Man Wants (1865)
Source: The Pregnant Virgin (1985), p. 60

The Zero Marginal Cost Society: The Internet of Things, the Collaborative Commons, and the Eclipse of Capitalism (2014)

Source: 1960s - 1980s, MANAGEMENT: Tasks, Responsibilities, Practices (1973), Part 1, p. 224
"Elio Fiorucci: Fashion, Love Therapy & Vegetarianism", interview with Roberta Schira, in finedininglovers.com (15 November 2013) https://www.finedininglovers.com/stories/interview-vegetarian-designer-elio-fiorucci/.

Address in Reply, 13 December 1792. Parl Hist xxx, 6.
"The Great Melody", biography of Burke by Conor Cruise O'Brien, p. 493.

“Any fool can tell the truth, but it requires a man of some sense to know how to lie well.”
Falsehood, iii
The Note-Books of Samuel Butler (1912), Part XIX - Truth and Convenience

"The Three Numbers" in Ellery Queen's Mystery Magazine (September 1974); reprinted in More Tales of the Black Widowers (1976)
General sources

"Age of Ignorance" New York Review of Books, March 20, 2012 http://www.nybooks.com/daily/2012/03/20/age-of-ignorance/

2
"The Hermeneutics of Suspicion: Recovering Marx, Nietzsche, and Freud"

Quoted in "The Military Quotation Book" - Page 49 - by James Charlton - 2002

Speech http://hansard.millbanksystems.com/commons/1989/mar/21/rent-officers in the House of Commons (21 March 1989).
1980s
Source: Organizational stress: Studies in role conflict and ambiguity, 1964, p. 22-23

Preface: The Theater and Culture
The Theatre and Its Double (1938, translated 1958)

1745
Source: History of Mathematics (1925) Vol.2, p.469

1860s, Reply to Charles Kingsley (1860)

“A game that requires the constant conjuring of animosity.”
On football, New York Times (10 Dec 1967).

Making Sense of Friedrich A. von Hayek: Focus/The Honest Broker for the Week of August 9, 2014 http://equitablegrowth.org/making-sense-friedrich-von-hayek-focusthe-honest-broker-week-august-9-2014/ (2014)
Source: The Role of Measurement in Economics. 1951, p. 14-15

Speech http://hansard.millbanksystems.com/commons/1971/nov/25/northern-ireland-1 in the House of Commons (25 November 1971)
Leader of the Opposition

On the Hypotheses which lie at the Bases of Geometry (1873)

1920s, Second State of the Union Address (1924)

Section III, p. 7
Natural Law; or The Science of Justice (1882), Chapter I. The Science of Justice.

It's the Sun, stupid http://www.norcalblogs.com/watts/2007/04/post_3.html, wattsupwiththat.com, April 6, 2007.
2007

John Vorster in his Heilbron speech http://www.sahistory.org.za/archive/extract-speech-made-heilbron-16-august-1968 on 16 August 1968, as quoted in sahistory.org.za

CIA probe 'not over' after Cheney's top aide indicted on CNN.com (October 28, 2005)

As quoted by David Milner, "Ishiro Honda Interview" http://www.davmil.org/www.kaijuconversations.com/honda.htm, Kaiju Conversations (December 1992)
“Improving quality requires a culture change, not just a new diet.”
Philip B. Crosby (1989), Let's Talk Quality: 96 Questions You Always Wanted to Ask Phil Crosby, p. 47

Speech on Armistice Day in Washington (11 November 1928), quoted in The Times (12 December 1928), p. 11.
1920s

Problema, numeros primos a compositis dignoscendi, hosque in factores suos primos resolvendi, ad gravissima ac utilissima totius arithmeticae pertinere, et geometrarum tum veterum tum recentiorum industriam ac sagacitatem occupavisse, tam notum est, ut de hac re copiose loqui superfluum foret. … [P]raetereaque scientiae dignitas requirere videtur, ut omnia subsidia ad solutionem problematis tam elegantis ac celebris sedulo excolantur.
Disquisitiones Arithmeticae (1801): Article 329

Source: Democracy Realizedː The Progressive Alternative (1998), p. 15

Speech https://api.parliament.uk/historic-hansard/commons/1933/mar/14/supply#column_1820 in the House of Commons (14 March 1933)
The 1930s
Douglas Foskett (2000-04) " From Librarianship to Information Science http://faculty.libsci.sc.edu/bob/scrapbook/foskett2.htm" at

The History of Freedom in Christianity (1877)

1960s, State of the Union Address (1966)

"Elisabetta Canalis: I’d Rather Go Naked Than Wear Fur" https://www.peta.org/features/elisabetta-canalis-rather-go-naked-wear-fur/, interview with PETA (8 September 2011).

Maktubat-i-Imam Rabbani translated into Urdu by Maulana Muhammad Sa’id Ahmad Naqshbandi, Deoband, 1988, Volume I, pp.435-36. This letter was written to Shaikh Farid.
From his letters
As quoted in Rainey, J. (2010, September 5). Paul Conrad dies at 86 http://articles.latimes.com/print/2010/sep/05/local/la-me-paul-conrad-20100905. Los Angeles Times.

Talk titled The Global Software Industry in Transformation: After GPLv3, Edinburgh, Scotland, June 26, 2007 http://www.archive.org/details/EbenMoglenLectureEdinburghJune2007text.

Speech http://hansard.millbanksystems.com/commons/1987/dec/01/elimination-of-poverty-in-old-age-etc in the House of Commons (1 December 1987).
1980s

1960s, State of the Union Address (1966)

as cited in Landscape Painting and Modern Dutch Artists, E. B. Greenshields https://ia902605.us.archive.org/6/items/landscapepaintin00greeuoft/landscapepaintin00greeuoft.pdf; The Copp, Clark, Co. Limited, Toronto, 1906, p. 150
Jacob Maris painted many 'Dutch City' paintings, in which he combined different parts of the cities Amsterdam, Dordrecht, Delft and Rotterdam

Source: 1960s, Management misinformation systems, 1967, p. 149.
Herman E. Daly (1994) in: AnnMari Jansson. Investing in Natural Capital: The Ecological Economics Approach To Sustainability. 1994. p. 24

Fernand Léger – Das Figürliche Werk, exhibition catalogue, Köln, 1978, p. 52
Quotes of Fernand Leger, 1970's

“Women, perhaps, even require a little hypocrisy.”
Peut-être veulent-elles [les femmes] un peu d'hypocrisie?
The Wild Ass’s Skin (1831), Part II: A Woman Without a Heart

Youtube, Other, Don't Blame the Atheists https://www.youtube.com/watch?v=_0Ca88xNw_w (October 21, 2012)
Martin Op 't Land, Erik Proper (2009) Enterprise Architecture: Creating Value by Informed Governance. p. 26-27

2010s
Source: Jonah Lehredec. " A Physicist Solves the City http://www.nytimes.com/2010/12/19/magazine/19Urban_West-t.html?pagewanted=5&_r=1," in www.nytimes.com. Dec 17, 2010.

Obergefell v. Hodges http://www.supremecourt.gov/opinions/14pdf/14-556_3204.pdf (26 June 2015).
2010s

The Rights of the Colonists (1772)

1920s, Authority and Religious Liberty (1924)
“To maintain good health requires good nutrition and a healthy dose of exercise.”
Erie Times, SportsWeek, March 3, 1986

Bush v. Gore, 531 U.S. 98 http://caselaw.lp.findlaw.com/scripts/getcase.pl?court=US&vol=000&invol=00-949 (12 December 2000).

Denn wir müssen sterben, mit kurzem Verzug, und vielleicht brauchen die Leichen keinen so weiten Faltenwurf, den Weg alles Fleisches zu gehen. Der brüderlich innere Reichtum wird nicht minder kurzer Spuk, verwest zu Baumrinde wie Rübezahls falsche Schätze: zeigt sich in ihm keine Kraft, gar den Tod zu bestehen, zu besiegen, mithin nicht nur von unten an hindurch zu gehen, sondern auch an sich selbst ein kräftig oberer Teil zu sein und das Wesenselement des ewigen Lebens.
Source: Man on His Own: Essays in the Philosophy of Religion (1959), p. 41

Source: (1962), Ch. 3 The Control of Money, p. 39

Rupert on the Issues https://web.archive.org/web/20130731155138/http://rupertforgovernor.com/issues, RupertForGovernor.com (2011)
Source: Organization and environment: Managing differentiation and integration, 1967, p. 4
In reference to the subject of Alien Abductions in an e-mail from Young to Feeney on Wed, January 1, 2003. [citation needed]

Source: Economics after the crisis : objectives and means (2012), Ch. 2 : Financial Markets: Efficiency, Stability, and Income Distribution

After the Revolution? (1970; 1990), Ch. 3 : Democracy and Markets

CNN Arizona Republican Presidential Debate http://transcripts.cnn.com/TRANSCRIPTS/1202/22/se.03.html,
posed question: "Should there be aggressive, seek them out, find them and arrest them as Sheriff Arpaio advocates?"; referring to lawsuits against Arizona SB1070
2012

Source: Law in Modern Societyː Toward a Criticism of Social Theory (1976), p. 259-260
Alexander's answer to the peace treaty offered by Darius III, p. 38
The Persian Boy (1972)

Speech in Newcastle (2 October 1891), quoted in A. W. Hutton and H. J. Cohen (eds.), The Speeches of The Right Hon. W. E. Gladstone on Home Rule, Criminal Law, Welsh and Irish Nationality, National Debt and the Queen's Reign. 1888–1891 (London: Methuen, 1902), p. 377.
1890s
The Owner Built Home: A How-to-do-it Book (1972)

Fodor (1986) "Why Paramecia Don’t Have Mental Representations," Midwest Studies in Philosophy 10: 3-23. cited in: Bradley Rives " Jerry A. Fodor (1935 – ) http://www.iep.utm.edu/fodor/" Internet Encyclopedia of Philosophy, Oct. 25, 2010

“Success requires no explanations, failure presents no alibis.”
Liebman, Glenn, Hockey Shorts: 1,001 of the games funniest one liners

Source: Writings, The Institutes of Biblical Law (1973), p. 236

L.V. Kantorovich (1996) Descriptive Theory of Sets and Functions. p. 39; As cited in: K. Aardal, George L. Nemhauser, R. Weismantel (2005) Handbooks in Operations Research and Management Science, p. 15-26
The Catholic Fireside Articles November 1924 Gillian Lindsay - The Story of the Lark Rise Writer 1990 ISBN 9781873855539
Literary Observations
The Agnostic's Prayer from the novel Creatures of Light and Darkness (1969)
Harold Powers, "Tonal Types", p.439.

Un Art de Vivre (The Art of Living) (1939), The Art of Leadership

From his speech given on 28 November 1960 at laying the foundation-stone of the building of the Law Institute of India, in: p. 16
Presidents of India, 1950-2003

Source: Civilizing Ourselves: Intellectual Maturity in the Modern World (1932), p. xi, Foreword