Quotes about principle
page 27

1860s, Oration at Ravenna, Ohio (1865)

William Sharpe’s February 1992 lecture at Trinity University: in: William Breit, Barry T. Hirsch (2009). Lives of the Laureates: Twenty-three Nobel Economists. p. 172

No. 243 (8 December 1711).
The Spectator (1711–1714)

“Wisdom and good governance require more than the consistent application of abstract principles.”
Romancing Opiates: Pharmacological Lies and the Addiction Bureaucracy (2006)

Ibid.
"The Ends of Zionism: Racism and the Palestinian Struggle"

Speech in Edinburgh (25 November 1879), quoted in W. E. Gladstone, Midlothian Speeches 1879 (Leicester University Press, 1971), p. 37.
1870s

As quoted in "Carson at CPAC: How to destroy America in 4 steps" http://humanevents.com/2013/03/17/dr-ben-carson-at-cpac-2013-how-to-destroy-america-in-four-easy-steps/, Human Events (March 17, 2013)
Introduction, p. vii; Partly cited in: Felix Behling et al., The Changing Worlds and Workplaces of Capitalism. 2015, p. 194
Experiments in industrial organization (1912)
Source: Perspectives on the World: an interdisciplinary reflection. (1995), p. v : About "The seven tasks of World-view construction"
As contained in The Rational Expectations Revolution: Readings From the Front Line https://en.wikiquote.org/wiki/Special:BookSources/0262631555, Preston J. Miller, MIT Press (reprint 1994), pp. 5-6
"After Keynesian macroeconomics" 1978

Freedom is a Constant Struggle: Closures and Continuities (2013)

Attributed to Apollonius in Philostratus, Life of Apollonius. Quoted from Ram Swarup (2000). On Hinduism: Reviews and reflections, Chapter India and Greece
I. Bernard Cohen, Preface to Opticks by Sir Isaac Newton (1952)

1920s, Whose Country Is This? (1921)

Letter to an autograph collector (identified: "Washington, 27th April, 1837"), published in The Historical Magazine 4:7 (July 1860), pp. 193-194 https://archive.org/stream/historicalmagaziv4morr#page/194/mode/1up; this became slightly misquoted by John Wingate Thornton in The Pulpit of The American Revolution (1860): "The highest glory of the American Revolution, said John Quincy Adams, was this: it connected, in one indissoluble bond, the principles of civil government with the principles of Christianity".
Source: Language, thought and reality (1956), p. 264.

The Economy of New Democracy
On New Democracy (1940)

Introduction, p. xxxix
The System of the World (1800)

“Glory, built
On selfish principles, is shame and guilt.”
Source: Table Talk (1782), Line 1.
Source: A History of Economic Thought (1939), Chapter VII, The Transition, p. 357

J. J. Sylvester. "Additional Notes to Prof. Sylvester's Exeter British Association Address", Collected Mathematical Papers, Vol. 2 (1908), pp. 717–718 https://babel.hathitrust.org/cgi/pt?id=miun.aas8085.0002.001;view=1up;seq=732

1950s, Rediscovering Lost Values (1954)

"Description and explanation in linguistics"
Quotes 2000s, 2007-09, (3rd ed., 2009)

2010s, 2016, June, Speech about the Orlando Shooting (June 13, 2016)

On John Major's decision to resign as party leader in order to contest a leadership election (The Daily Mail, 27 June, 1995).
1990s
The Complete Neurotic's Notebook (1981), Unclassified

Source: Dictionary of Burning Words of Brilliant Writers (1895), p. 396.

Section V, p. 13
Natural Law; or The Science of Justice (1882), Chapter II. The Science of Justice (Continued)

"Antitrust", essay at the National Association of Business Economists (25 September 1961); published in Rand, Capitalism: The Unknown Ideal.
1950–60s
The Oaken Heart

2012-08-11
http://mittromneycentral.com/2012/08/11/video-and-transcript-romney-making-his-vp-announcement/
Video and Transcript: Romney Making His VP Announcement
Mitt Romney Central
2012

Quoted in "The Nineteen Days: A Broadcaster's Account of the Hungarian Revolution" - by George R. Urban - 1957
Source: Mathematical Thought from Ancient to Modern Times (1972), p. 183

"Le concept de l'absolu, d'où découlent, dans le domaine moral, les lois ou normes morales, constitue, le principe d'identité, qui est la loi fondamentale de la pensée; il en découle les normes logiques qui régissent la pensée dans le domaine de la science."
Source: Words of a Sage : Selected thoughts of African Spir (1937), p. 59 [Hélène Claparède-Spir had underlined - the translator]

Speech given January 2003.
This American Life http://www.thislife.org/pages/descriptions/04/258.html, Ep. 258, 01/30/04, Leaving the Fold; Act One.

Only partially true. The full quote:
Only one danger could have jeopardised this development – if our adversaries had understood its principle, established a clear understanding of these ideas, and not offered any resistance. Or, alternatively, if they had from the first day annihilated with the utmost brutality the nucleus of our new movement.
He thought that if his adversaries had ignored the ‘weakest’ elements of his movement, they would harm the party. See zuriz https://zuriz.wordpress.com/2013/10/06/smashing-the-nucleus/ for more.
Misattributed

Letter to the Cabinet (January 1942), quoted in Paul Addison, The Road to 1945 (London: Pimlico, 1994), pp. 202-203
1940s

Source: Presidents of India, 1950-2003, p. 167.

1920s, Toleration and Liberalism (1925)

First Memoir.
The Mechanical Theory of Heat (1867)

1990s, I Am a Man, a Black Man, an American (1998)

On the Role of Leadership in the West vs Role of Leadership in Shi'ism (date of speech unknown). https://www.youtube.com/watch?v=0evSkdzXF_4
Speeches: On Religious Government and Islamic Leadership

Source: Oak Openings or The bee-hunter (1848), Ch. XVI

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)

New York Times (6 January 2002) "Someone Tell the Kids".

Variant translations:
What we possess and what gives us strength is our joy in life, our interest in life in all its amoral facets. This is also the foundation for today's art. We do not even know the aesthetic laws.
We are not disillusioned because we have no illusions; we have never had any. What we have, and what constitutes our strength, is our joy in life, in all of its moral and amoral manifestations.
1940 - 1948, Intimate Banalities' (1941)

Speech in West Calder, Scotland (27 November 1879), quoted in W. E. Gladstone, Midlothian Speeches 1879 (Leicester University Press, 1971), pp. 116-117.
1870s

The Cornerstone Speech (1861)

Pg 159.
Conquest of Abundance (2001 [posthumous])

Speech http://hansard.millbanksystems.com/commons/1991/mar/26/community-charges-general-reduction-bill in the House of Commons (26 March 1991), referring to Michael Heseltine. MPs are referred to in the House by the constituency they represent rather than by their name, so Mr Heseltine would be "Rt. Hon. Member for Henley". Whether by accident or intent, Foot mixed this up in a way which clearly amused other MPs.
1990s
“Liberalism and its Discontents,” pp. 20-21.
Outside Ethics (2005)

" Planning, Science and Freedom http://www.nature.com/nature/journal/v148/n3759/abs/148580a0.html", Nature 148 (15 November 1941), also available as " Planning, Science, and Freedom https://mises.org/library/planning-science-and-freedom," Mises Daily (Auburn, AL: The Ludwig von Mises Institute, 27 September 2010)
1940s–1950s

Source: Life Itself : A Memoir (2011), Ch. 54 : How I Believe In God
Source: Principles of management, 1968, p. 1 (1968 edition)

Epilogue (p. 687)
The Dragon in the Sword (1986)

Source: Books, Spiritual Warrior, Volume III: Solace for the Heart in Difficult Times (Hari-Nama Press, 2000), Chapter 1 - The Choice Before Humanity

"Bernie Sanders to Liberty University: America Founded on 'Racist Principles, That's a Fact'" by Fred Lucas, in The Blaze (14 September 2015) http://www.theblaze.com/stories/2015/09/14/bernie-sanders-to-liberty-university-america-founded-on-racist-principles-thats-a-fact/
2010s, 2015

Source: [Gibbons, H. A., Venizelos, Modern Statesmen Series, Houghton Mifflin Company, 1920, http://books.google.com/books?id=DVMlZtkx5bwC], p. 17

Preface p. v
A History of Greek Mathematics (1921) Vol. 1. From Thales to Euclid
Individualism and Socialism (1933)
2010s, Confederation Again (July 2018)

Source: Rules for Radicals: A Practical Primer for Realistic Radicals (1971), p. 24–25

Letter to F. W. Cobden (16 August 1842), quoted in John Morley, The Life of Richard Cobden (London: T. Fisher Unwin, 1905), p. 299.
1840s

Excerpt from his book White Fluffy Clouds.

A week before Iraq's parliamentary election https://www.irishtimes.com/news/abu-musab-al-zarqawi-in-quotes-1.786124 The Irish Times (23rd January 2005)
Source: How Europe Underdeveloped Africa (1972), p. 223.

Tusnádfürdő speech http://www.kormany.hu/en/the-prime-minister/the-prime-minister-s-speeches/prime-minister-viktor-orban-s-speech-at-the-25th-balvanyos-summer-free-university-and-student-camp, 26 July 2014

Zhang Zhijun (2017) cited in " Presidential spokesman disappointed with KMT over WHA participation http://focustaiwan.tw/news/acs/201705090030.aspx" on Focus Taiwan, 9 May 2017.

Commonly attributed to Spencer, information provided in The Quote Verifier: Who Said What, Where, and When (2006) by Ralph Keyes and The Survival of a Fitting Quotation. (2005) by Michael StGeorge http://anonpress.org/spencer/, indicates the attribution may have originated with the book [w:The_Big_Book_(Alcoholics_Anonymous)|Alcoholics Anonymous]]. It was used exactly as written above in the personal stories section of the first edition in 1939 and in 'Appendix II: Spiritual Experience' of all subsequent editions.
: "Contempt prior to examination" was a phrase used by William Paley, the 18th-century English Christian apologist. In A View of the Evidences of Christianity (1794), he wrote:
::The infidelity of the Gentile world, and that more especially of men of rank and learning in it, is resolved into a principle which, in my judgment, will account for the inefficacy of any argument, or any evidence whatever, viz. contempt prior to examination.
:Paley's characterization of non-believers was later modified and used by other religious authors who uniformly attributed their words to Paley. In Anglo-Israel or, The British Nation: The lost Tribes of Israel (1879), Rev. William H. Poole may have been the first to render the quotation in its more familiar and enduring form:
::There is a principle which is a bar against all information, which is proof against all argument, and which cannot fail to keep a man in everlasting ignorance. This principle is, contempt prior to examination.
:Various authors following Rev. Poole would offer new iterations of the quotation into the early decades of the 20th century. Most of these credited William Paley, but by the early 1930s the first obscure publications to falsely attribute this quote to Spencer emerged. Its usage for decades since as a maxim in Alcoholics Anonymous and the twelve-step recovery community has popularized its erroneous association with Herbert Spencer.
Misattributed
The First Sex, ch. 22 - Woman in the Aquarian Age (1971). "Masculist" is a coined word meant to correlate grammatically with "feminist."

On ne peut réfléchir sur les precepts de la morale sans être étonné de les voir tout à la fois estimés et négligés; et l'on se demande la raison de cette bizarrerie du cœur humain, qui lui fait goûter des idées de bien et de perfection dont il s'éloigne dans la pratique.
Avis de l'auteur, pp. 30-31; translation p. 4.
L'Histoire du chevalier des Grieux et de Manon Lescaut (1731)

1970s, Synergetics: Explorations in the Geometry of Thinking (1975), The Wellspring of Reality
Since these principles are carefully explained and illustrated by Miss Follett herself in the final paper in this volume, we must content ourselves here with merely this concise statement of them.
Source: Dynamic administration, 1942, p. xxvi

The Spiral Staircase: My Climb Out of Darkness (2004)

Oppose the Spendthrift 2005 Federal Budget Resolution, March 25, 2004 http://www.house.gov/paul/congrec/congrec2004/cr032504.htm
2000s, 2001-2005

Source: De architectura (The Ten Books On Architecture) (~ 15BC), Book V, Chapter V, Sec. 3

“Father says don’t kill your principles just because the government is paying for the funeral.”
Source: The Wine of Violence (1981), Chapter 22 (pp. 257-258)

In his speech from April 2010 http://rt.com/news/lavrov-council-europe-speech/

Quotes 1990s, 1995-1999, Education and Democracy, 1995