This quote is a paraphrase of the contents of the first chapter of Discourse on Voluntary Servitude. The quote appears in an edition titled Politics of Obedience: The Discourse of Voluntary Servitude edited by Murray Rothbard and Harry Kurz (1975), p. 39 http://books.google.com/books?id=6o-8P3iqf7IC&pg=PA39
Disputed
Quotes about politics
page 4

Muqaddimah, Translated by Franz Rosenthal, pp.183-184, Princeton University Press, 1981.
Muqaddimah (1377)

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

1950s, The Russell-Einstein Manifesto (1955)

"Man – and Woman" in Vermont Freeman (Mid-February 1972) http://www.motherjones.com/files/Man_and_Woman_0.jpg; partially quoted, out of context in "Bernie Sanders: Woman 'fantasizes being raped'" http://www.washingtonexaminer.com/bernie-sanders-woman-fantasizes-being-raped/article/2565191 by Ariel Cohen, Washington Examiner (28 May 2015)
1970s

In a email message to his delegates — Sanders's full message: Movement damaged by 'booing, walking out' https://www.washingtonpost.com/news/post-politics-live/liveblog/democratic-national-convention-updates/?tid=ss_tw#8cab91a2-7c6f-4a9f-97ff-d42dffa875e4, The Washington Post (25 July 2016)
2010s, 2016

1978, Towards Understanding Islam, Chapter 7, Lahore, Pakistan.
1970s

Speech http://hansard.millbanksystems.com/commons/1845/apr/11/maynooth-college in the House of Commons (11 April 1845).
1840s

1910s, The Progressives, Past and Present (1910)

Quoted in "The Devil's Disciples: Hitler's Inner Circle" - Page 807 - by Anthony Read - History - 2004.

Pericles commenting the participation of Athenian citizens in politics, as quoted in Models of Democracy (2006) by David Held, Stanford University Press, p. 14. Book II, chapter 40.

Speech http://hansard.millbanksystems.com/commons/1846/may/15/corn-importation-bill-adjourned-debate in the House of Commons (15 May 1846).
1840s

1900s, First Annual Message to Congress (1901)

Gunasekara, quoted on BBC News, What is the Kumaratunga Legacy? http://news.bbc.co.uk/2/hi/south_asia/4452714.stm, November 19, 2005.
About

Source: Kritik der zynischen Vernunft [Critique of Cynical Reason] (1983), pp. 60-61

The Election of Donald Trump https://mrzine.monthlyreview.org/2016/amin301116.html (30 November 2016), Monthly Review Magazine (MRzine)

"DECKER: 5 Questions with Geert Wilders", The Washington Times (14 September 2012) http://www.washingtontimes.com/news/2012/sep/14/geert-wilders-5-questions-with-decker/
2010s

2010s, Democracy Now! interview (2011)

“The greatest leveler is politeness; it removes all class distinctions.”
Die größte Gleichmacherin ist die Höflichkeit, durch sie werden alle Standesunterschiede aufgehoben.
Source: Aphorisms (1880/1893), p. 58.

In Orlando after the Orlando nightclub shooting ([President Obama: Orlando Families' Grief Is 'Beyond Description', Time, Maya, Rhodan, June 16, 2016, September 2, 2018, http://time.com/4372190/orlando-shooting-barack-obama-joe-biden-grief/]; [‘Our hearts are broken, too’: Obama visits survivors of Orlando rampage, Katie, Zezima, Ellen, Nakashima, Mark, Berman, June 16, 2016, September 2, 2018, The Washington Post, https://www.washingtonpost.com/news/post-nation/wp/2016/06/16/obama-looks-toward-grieving-orlando-in-visit-as-political-showdowns-expand-after-massacre/]; [After meeting with Orlando victims, Obama renews call for gun control, Gregory, Korte, USA Today, June 16, 2016, September 6, 2018, https://www.usatoday.com/story/news/politics/2016/06/16/obama-biden-visit-orlando-emotional-visit-after-shooting/85973066/]).
2016, After the Orlando nightclub shooting (June 2016)

Speech http://hansard.millbanksystems.com/commons/1846/feb/20/commercial-policy-customs-corn-laws in the House of Commons (20 February 1846).
1840s

“In politics, an absurdity is not an impediment.”
Napoleon : In His Own Words (1916)

2016-01-06, on being called the 'architect' of the Saudi intervention in Yemen. Interview with Muhammad bin Salman, The Economist

Source: “ 25:13 Our Only Hope Will Come Through Rebellion http://www.youtube.com/watch?v=TOlg_2qAbUA” (2014)
Preview; lead paragraph
The Administrative State, 1948

Fourth State of the Union Address (6 December 1904)
1900s

ibid.
1870s

Defending himself against a treason charge, on 19 December, 1953

“Mingling religion with politics may be disavowed and reprobated by every inhabitant of America.”
1770s, Common Sense (1776)

On the Wardenclyffe Tower, in "The Future of the Wireless Art" in Wireless Telegraphy and Telephony (1908)

Knox College Commencement Address (4 June 2005)
2005

Letter to Lady John Manners (14 June 1884), from Paul Smith (ed.), Lord Salisbury on politics: a selection from his articles in the Quarterly Review, 1860–83 (1972), p. 18, footnote
1880s

Cited from Lord Rayleigh, The Life of Sir J. J. Thomson (1943), p. 199.
Attributed

Comment to General Henry Knox on the delay in assuming office (March 1789)
1780s

“Politics is like boxing — you try to knock out your opponents.”
Interview, African summit talks, Angola, January 1976. Reported p.A8, Palm Beach Post, January 12, 1976.

Introduction, translated and reproduced in Hirst (1909), p. 291
The National System of Political Economy (1841)

1860s, Fourth of July Address to Congress (1861)

As quoted in "Xi calls for peaceful development of cross-Straits ties" http://www.chinadaily.com.cn/china/2013xiapec/2013-10/06/content_17011186.htm in China Daily (6 October 2013).
2010s

Book III, Chapter 9.
Books, Coningsby (1844), Vivian Grey (1826)

¿Tienen algo que ver con los intereses de los humildes las querellas retóricas de los partidos burgueses?
The War at the End of the World (1981)

Remarks by the President in YSEALI Town Hall at Taylor's University in Kuala Lumpur, Malaysia (November 20, 2015) https://www.whitehouse.gov/the-press-office/2015/11/20/remarks-president-yseali-town-hall
2015

Speech on the 24th Anniversary of the Revolution
Stalin's speeches, writings and authorised interviews

1860s, Allow the humblest man an equal chance (1860)

The remarks concerned the presidential election of 1880.
As quoted in The New York Times (12 February 1881).
1880s

Source: No Way Out (2002), Ch. 7: What Kind Of Human Being Do You Want?

Speech in Keehi Lagoon Beach Park, Hawaii, (8 August 2008) http://vids.myspace.com/index.cfm?fuseaction=vids.individual&VideoID=40384154
2008

Source: Capitalism and Modern Social Theory (1971), p. 16 (Quote is from Marx, Early Writings (1964), p. 154).

2016, State of the Union address (January 2016)

2013, "Let Freedom Ring" Ceremony (August 2013)

First recorded in Terra Nossa: Newsletter of Project Abraço, North Americans in Solidarity with the People of Brazil http://books.google.gr/books?id=iR68AAAAIAAJ&q=, Vols. 1–7, Resource Center for Nonviolence, 1988, p. 42. No citation to a book by Brecht is given.
Disputed

This is from a fictional speech by Lincoln which occurs in The Clansman : An Historical Romance of the Ku Klux Klan (1905) by Thomas Dixon, Jr.. On some sites this has been declared to be something Lincoln said "soon after signing" the Emancipation Proclamation, but without any date or other indications of to whom it was stated, and there are no actual historical records of Lincoln ever saying this.
Misattributed

On the Decay of the Art of Lying, published in The Stolen White Elephant: Etc, Pages 220-221 http://books.google.com/books?id=rTv19WvJto4C&q=%22The+highest%22+%22perfection+of+politeness+is+only+a+beautiful+edifice+built+from+the+base+to+the+dome+of+graceful+and+gilded+forms+of+charitable+and+unselfish+lying%22&pg=PA221#v=onepage (1882)

“Without alienation, there can be no politics.”
Marxism Today (January 1988)

The Ballot or the Bullet (1964), Speech in Detroit, Michigan (12 April 1964)

1910s, The Progressives, Past and Present (1910)

Remarks by the President at the Nunn-Lugar Cooperative Threat Reduction Symposium hold at The National War College in Washington, D.C. on December 03, 2012. http://www.whitehouse.gov/the-press-office/2012/12/03/remarks-president-nunn-lugar-cooperative-threat-reduction-symposium
2012

Statements in PBS interview with Margaret Warner (October 11, 2013)

“Politics is the art of stopping people from minding their own business.”
Tel Quel (1943)

"My Paris" (1983), p. 235
It All Adds Up (1994)

Nordhaus, William D., and James Tobin. " Is growth obsolete? http://www.nber.org/chapters/c7620.pdf." Economic Research: Retrospect and Prospect Vol 5: Economic Growth. Nber, 1972. 1-80.
1970s and later

On Vanessa Redgrave, reported by Spartanburg Herald-Journal, 28 December 1979. http://news.google.com/newspapers?id=VW0sAAAAIBAJ&sjid=y80EAAAAIBAJ&pg=2069,7100074

1990s, Letter to the Union-Sun & Journal (1992)

Les liens entre un être et nous n'existent que dans notre pensée. La mémoire en s'affaiblissant les relâche, et, malgré l'illusion dont nous voudrions être dupes et dont, par amour, par amitié, par politesse, par respect humain, par devoir, nous dupons les autres, nous existons seuls. L'homme est l'être qui ne peut sortir de soi, qui ne connaît les autres qu'en soi, et, en disant le contraire, ment.
Source: In Search of Lost Time, Remembrance of Things Past (1913-1927), Vol. VI: The Sweet Cheat Gone (1925), Ch. I: "Grief and Oblivion"

per March 2003 article by New York Magazine http://nymag.com/nymetro/news/people/n_7912/

That would not make a bad programme for a British Ministry. It is one from which Her Majesty's advisers do not shrink.
Source: Speech at the Guildhall, London (9 November 1879), cited in William Flavelle Monypenny and George Earle Buckle, The Life of Benjamin Disraeli, Earl of Beaconsfield, Vol. 2 (1929), pp. 1366-7.

Parade (1 February 1981); cited in Thy Kingdom Come : How the Religious Right Distorts Faith and Threatens America (2007)

Section 3, paragraph 9.
The Manifesto of the Communist Party (1848)

In a video posting, announcing his candidacy for President of the United States (16 January 2007) http://www.barackobama.com/video/from_barack_transcript/
2007

2000s, Youth Q&A on the U.N. High-Level Panel on the Post-2015 Agenda Report (2009)

The Ballot or the Bullet (1964), Speech in Cleveland, Ohio (April 3, 1964)
Source: How Europe Underdeveloped Africa (1972), p. 446.

Dissenting in Harper v. Virginia Board of Elections, 383 U.S. 663 (1966).

History Of The Freedom Movement In India Vol. 1 https://archive.org/stream/history1_201708/History+of+the+Freedom+Movement+in+India+Vol+1+-+RC+Majumdar_djvu.txt quoted from Elst, Koenraad (2014). Decolonizing the Hindu mind: Ideological development of Hindu revivalism. New Delhi: Rupa. p. 310-311

Source: The Subversion of Christianity (1984), p. 114

Source: Speech in the House of Lords (10 December 1876), quoted in William Flavelle Monypenny and George Earle Buckle, The Life of Benjamin Disraeli, Earl of Beaconsfield. Volume II. 1860–1881 (London: John Murray, 1929), p. 1273.

To A Poet, Who Would Have Me Praise Certain Bad Poets, Imitators of His and Mine http://poetry.poetryx.com/poems/1724/
The Green Helmet and Other Poems (1910)

Statement at a press conference following Reverend Jeremiah Wright's speech at a Press Club event (29 April 2008) http://embeds.blogs.foxnews.com/2008/04/29/obama-calls-it-quits-with-former-pastor-jeremiah-wright/
2008

Letter to Gilbert Murray, April 3, 1902
1900s

"The Progressive Covenant With The People" http://memory.loc.gov/cgi-bin/query/r?ammem/papr:@filreq(@field(NUMBER+@band(trrs+1146))+@field(COLLID+roosevelt)) speech (August 1912)
1910s
Context: Political parties exist to secure responsible government and to execute the will of the people. From these great tasks both of the old parties have turned aside. Instead of instruments to promote the general welfare they have become the tools of corrupt interests, which use them impartially to serve their selfish purposes. Behind the ostensible government sits enthroned an invisible government owing no allegiance and acknowledging no responsibility to the people. To destroy this invisible government, to dissolve the unholy alliance between corrupt business and corrupt politics, is the first task of the statesmanship of the day.

The Ballot or the Bullet (1964), Speech in Detroit, Michigan (12 April 1964)

As quoted in The Myth of the Nation and the Vision of Revolution: The Origins of Ideological Polarization in the 20th Century, Jacob L. Talmon, University of California Press (1981) p. 451. Sorel’s March 1921 conversations with Jean Variot, published in Variot’s Propos de Georges Sorel, (1935) Paris, pp. 53-57, 66-86 passim

1910s, The New Nationalism (1910)

"The Value of Literature to Men of Business," speech at the Manchester Athenaeum (23 October 1844), cited in Selected Speeches of the Late Right Honourable the Earl of Beaconsfield, Vol. 2 (1882), p. 625.
1840s

Debate with Walter Mondale http://www.reagan.utexas.edu/archives/speeches/1984/102184b.htm (21 October 1984)
1980s, First term of office (1981–1985)

On legal paternalism: United States v. Virginia (1996) (dissenting).
1990s

The Three Phases of National Reconstruction (1918)

To Duff Green, aboard the USS Malvern http://www.thelincolnlog.org/Results.aspx?type=CalendarDay&day=1865-04-04&r=L0NhbGVuZGFyWWVhci5hc3B4P3llYXI9MTg2NSZyPUwwTmhiR1Z1WkdGeUxtRnpjSGc9 (4 April 1865), as quoted in Incidents and Anecdotes of the Civil War https://archive.org/details/incidentsanecdot00portiala (1885), by David Dixon Porter, p. 308
1860s

1900s, Address at the Prize Day Exercises at Groton School (1904)