As quoted on the BBC Web Site http://www.bbc.co.uk/news/uk-scotland-scotland-business-11106098 (27th August 2010)
Quotes about opportunity
page 11

Latina Magazine (September, 2007)
2007, 2008

2000s, 2002, State of the Union address (January 2002)

“When opportunity knocks, We are either out or sleeping in.”
Quotations from Gurudev’s teachings, Chinmya Mission Chicago

The Guardian http://www.guardian.co.uk/stage/2009/may/16/ethan-hawke-cherry-orchard-old-vic-mendes (2009-05-16)
2005–2009

2012-02-10
Santorum Steps In It: Women Shouldn't be in Combat Because of 'Other Types of Emotions'
Tina
Dupuy
Crooks and Liars
http://crooksandliars.com/tina-dupuy/santorum-steps-it-says-women-shouldnt-b
2012-02-21

Source: Never Again: Securing America and Restoring Justice (2006), p. 192

Source: Victory of Venizelos, 1920, p. 176 ; After one of the many attempts of Venizelos to persuade King Constantine, that Greece should join the Allies in the World War I.

Letter from Nigel Farage that was hand delivered to 10 Downing Street by Nigel Farage himself, challenging the Prime Minister to an open debate on the EU, 16 July 2012 - Nigel delivers challenge to Downing Street. http://www.ukip.org/content/latest-news/2719-nigel-delivers-challenge-to-downing-street
2012

“Hairy in front, opportunity is bald behind.”
Fronte capillata, post est occasio calva.
Disticha, Bk. ii, No. 26. The Distichs of Cato were long attributed to Cato the Elder but probably are the work of a much later author called Dionysius Cato from the 3rd or 4th century A.D.
Misattributed
Letter to Ahmad Shah Abdali, Ruler of Afghanistan. Translated from the Urdu version of K.A. Nizami, Shãh Walîullah Dehlvî ke Siyãsî Maktûbãt, Second Edition, Delhi, 1969, p.83 ff.
From his letters

Source: 1930s- 1950s, Landmarks of Tomorrow: A Report on the New 'Post-Modern' World (1959), p. 121

Speech to Bexley Conservative Women (15 September 1949) http://www.margaretthatcher.org/document/100836
1940s

1920s, Whose Country Is This? (1921)

1930s, Speech to the Democratic National Convention (1936)

Republican national convention, , quoted in * 2012-08-29
Transcript: Rep. Paul Ryan's Convention Speech
NPR
http://www.npr.org/2012/08/29/160282031/transcript-rep-paul-ryans-convention-speech
2012-09-30

Address to Sathya Sai School in Matawalu, Ba Province, 8 February 2006.
Source: Crisis Management: A Model For Managers (1993), p. 4-5

Source: Why Men Earn More (2005), p. 93-94.

Letter to George Washington (July 1776)

Presidential campaign (April 12, 2015 – 2016), Speech in Warren, Michigan (August 11, 2016)

President Saddam Hussein's Speech on National Day (1981)

“I always tried to turn every disaster into an opportunity.”
Rich Dad Poor Dad: What the Rich Teach Their Kids About Money-That the Poor and the Middle Class Do Not!

Demi Moore Cover Interview - Demi Moore on Fame and Family - Harper's BAZAAR August 3, 2010 http://www.harpersbazaar.com/magazine/cover/demi-moore-cover-interview-0410

1960s, Civil Rights Bill signing speech (1964)

1920s, The Genius of America (1924)

1960s, Family Planning - A Special and Urgent Concern (1966)
On Politics: A History of Political Thought: From Herodotus to the Present (2012), Ch. 1 : Why Herodotus?
Quoted in 2007 article. [April 27, 2007]

Quoted on BGR (February 7, 2016), "India ready to offer assistance to Sri Lanka in IT sector: Sushma Swaraj" http://www.bgr.in/news/india-ready-to-offere-assistance-to-sri-lanka-in-it-sector-sushma-swaraj/

Jacob Leupold, quoted in: Biography of Jacob Leupold (1674–1727) http://history-computer.com/People/LeupoldBio.html on history-computer.com, 2013

Democratic Presidential Debate May 13, 2003 http://www.washingtonpost.com/ac2/wp-dyn?pagename=article&node=&contentId=A16686-2003May5¬Found=true

(describing Rousseau’s philosophy) p. 55
Kritik der zynischen Vernunft [Critique of Cynical Reason] (1983)

Keynote Address at the Vital Voices Conference in Vienna, Austria (11 July 1997)
White House years (1993–2000)

Late Night with Seth Meyers (2 June 2015) http://www.youtube.com/watch?v=BFAq-4Vv5c0
2010s, 2015

Remarks at the United Negro College Fund, Indianapolis, Indiana (12 April 1959) http://www.jfklibrary.org/Research/Research-Aids/Ready-Reference/JFK-Quotations.aspx; Box 902, Senate Speech Files, Pre-Presidential Papers, John F. Kennedy Papers, John F. Kennedy Presidential Library; also in Remarks at Valley Forge Country Club, Pennsylvania (29 October 1960), Box 914, Senate Speech Files, Pre-Presidential Papers, John F. Kennedy Papers, John F. Kennedy Presidential Library
Pre-1960

The Plot: The Secret Story of the Protocols of the Elders of Zion (10/2/2005)

Kap Maceda Aguila, "The Substance of Chiz", People Asia, 2006 June, p. 51, ISSN 0119-657X.
2006

Interview with a Mermaid http://www.beliefnet.com/columnists/peanutsandpopcorn/2013/09/interview-with-a-mermaid.html (2014)

From Created Equal, an episode of the PBS Free to Choose television series (1980, vol. 5 transcript) http://www.freetochoosemedia.org/broadcasts/freetochoose/detail_ftc1980_transcript.php?page=5.

Hearing of the Senate Judiciary Committee on the Nomination of Clarence Thomas to the Supreme Court http://etext.lib.virginia.edu/etcbin/toccer-new-yitna?id=UsaThom&images=images/modeng&data=/lv6/workspace/yitna&tag=public&part=24, Electronic Text Center, University of Virginia Library (October 11, 1991).
1990s
Aphorisms

The Jewish Strategy, Chapter 12 "Christianity"
1990s, The Jewish Strategy (2001)
Hermann Bondi, Assumption and Myth in Physical Theory, (1967) p. v

Alasdair Ferguson (June 7, 2002) "As The X-Files ends, I realise how much", The Express.
2000s

Speech at UC Berkeley http://www.jewishsf.com/content/2-0-/module/displaystory/story_id/19324/edition_id/391/format/html/displaystory.html, November 22, 2002

“Always measure opportunities lost.”
Source: Rotberg, Eugene. (2009). ** “A 40-Year Retrospective.” In Grumpy Old Bankers: Wisdom from Crises Past (pp. 80-83). Tonbridge, Kent: Centre for the Study of Financial Innovation." https://static1.squarespace.com/static/54d620fce4b049bf4cd5be9b/t/55351f89e4b0995b98f45d11/1429544841321/Grumpy+Old+Bankers%2C+wisdom+from+crises+past.pdf

The answer is everything!
Presidential campaign (April 12, 2015 – 2016), Speech in Reno, Nevada (August 25, 2016)

1960s, Address to Local 815, Teamsters and the Allied Trades Council (1967)

"The Indian Jugglers"
Table Talk: Essays On Men And Manners http://www.blupete.com/Literature/Essays/TableHazIV.htm (1821-1822)

Letter to his aunt Beatriz describing what he had seen while traveling through Guatemala (1953); as quoted in Che Guevara: A Revolutionary Life (1997) by Jon Lee Anderson ISBN 0802116000
"Reminiscences of an American Loyalist" (first published serially in "Notes and Queries", 1874-)
Source: Life, the Truth, and Being Free (2010), p. 125

“I’m all for offending people’s religion. I think it should be offended at every opportunity”

Source: Books, Spiritual Warrior, Volume I: Uncovering Spiritual Truths in Psychic Phenomena (Hari-Nama Press, 1996), Chapter 1: Dreams: A State of Reality, p. 24

Source: Debt: The First 5,000 Years (2011), Chapter Eleven, "Age of the Great Capitalist Empires", p. 314

Source: Legal foundations of capitalism. 1924, p. 320

Source: Between Caesar and Jesus (1899), p. 20

Source: Discussion with reporters Portia Li and Carla Marinucci, in San Francisco http://web.archive.org/web/20060427191647/http://www.sfgate.com/cgi-bin/object/article?f=/chronicle/archive/2005/06/07/MNdean07.TMP&o=1, June 6, 2005
The Naked Communist (1958)
As quoted in We Hold These Truths https://books.google.com/books?id=QQH6lsN4TIIC&pg=PA73&dq=%22I+believe+a+time+will+come+when+an+opportunity+will+be+offered+to+abolish+this+lamentable+evil.%22&hl=en&sa=X&ved=0CCgQ6AEwAmoVChMI6NiP0LjSxwIVBD0-Ch1EqwFq#v=onepage&q=%22I%20believe%20a%20time%20will%20come%20when%20an%20opportunity%20will%20be%20offered%20to%20abolish%20this%20lamentable%20evil.%22&f=false, by Randall Norman Desoto, p. 73
1770s, Letter to Robert Pleasants (1773)

Liberty-Equality-Fraternity (1942)

Speech delivered at Patna University Convocation on 27th November 1937.

1960s, State of the Union Address (1966)
continuity (13) “Multiply by a Million”
Stand on Zanzibar (1968)

Source: The Exposition of 1851: Views Of The Industry, The Science, and the Government Of England, 1851, p. v-vi: Preface

TechCrunch: <nowiki>"Sean Parker and Shawn Fanning Hint At The Future Of Airtime [TCTV https://techcrunch.com/2012/06/05/sean-parker-airtime-app-platform-cool/"</nowiki>] (5 June 2012)

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 197.

Interview with Forbes: "Oracle's Mark Hurd: Innovation, Savings Make Cloud Transition 'Inevitable'" https://www.forbes.com/sites/oracle/2016/09/15/oracles-mark-hurd-innovation-savings-make-cloud-transition-inevitable/ (15 September 2016)
Interview by Alec Mouhibian in The Free Radical (November 2004)

2016, Remarks on Donald Trump and the 2016 race

Source: The Heart of Change, (2002), p. 130 (in 21013 edition)

Part III, p. 98.
The Autobiography (1818)

Chelsea FC, Doctorate Honoris Causa degree award (23 March 2009)

Source: The Intelligent Investor: The Classic Text on Value Investing (1949), Chapter II, The Investor and Stock-Market Fluctuations, p. 42
in Tony Judt: the last interview http://www.prospectmagazine.co.uk/magazine/tony-judt-interview by Peter Jukes (2010)

The New Day: Campaign Speeches of Herbert Hoover (1928), Campaign speech in New York (22 October 1928)

1920s, The Democracy of Sports (1924)

1920s, The Press Under a Free Government (1925)

“Everything you do is an opportunity cost. Learn to say “No””
Time Management (2007)