Quotes about liar
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“There is no such thing as a good writer and a bad liar.”
Source: A Blind Man Can See How Much I Love You

“And I, love, am a pathological liar.”
Source: The Unabridged Journals of Sylvia Plath

“We Indians really should be better liars, considering how often we've been lied to.”
Source: The Absolutely True Diary of a Part-Time Indian

“The best liars are those who tell the truth most of the time.”

“One can be absolutely truthful and sincere even though admittedly the most outrageous liar.”
“Oh.' I shot upright. 'I was in Mongolia.'
Note to self: learn to be a less extreme liar.”
Source: I'd Tell You I Love You, But Then I'd Have to Kill You

“The truthful man is usually a liar.”

al-Tabarsi, Al-Ihtijaj, vol.2, p. 478
Religious-based Quotes

"4th Foundational Falsehood of Creationism" https://www.youtube.com/watch?v=80nhqGfN6t8, Youtube (December 25, 2007)
Youtube, Foundational Falsehoods of Creationism

“I was paraphrasing what Mark Schorer said about Sinclair Lewis,” Bruce replied.
“The Joker’s Greatest Triumph”.
Come Back, Dr. Caligari (1964)

"The Characteristics of Propaganda" in Readings in Propaganda and Persuasion : New and Classic Essays (2006) edited by Garth S. Jowett and Victoria O'Donnell, p. 48, note 47

Source: The Tales of Alvin Maker, Alvin Journeyman (1995), Chapter 10.
Broken Lights Letters 1951-59.

Addressed to George W. Bush in "go home, gw" http://www.moby.com/journal/2006-09-10/go_home_gw.html, journal entry (10 September 2006) at moby.com

2010s, 2016, August, Speech at rally in Wilmington, North Carolina (August 9, 2016)

“Thou liar of the first magnitude.”
Act II, scene ii
Love for Love (1695)
Variant: Ferdinand Mendez Pinto was but a type of thee, thou liar of the first magnitude.

“I didn't lie; nobody calls me a liar, I may have increased my age.”
Joking on joining the Army at age 15.
CNN March 8, 2008.

Essay in the anthology The War Poets (1945) edited by Oscar Williams

Last e-mail to parents (2009)
"Epitaph for a Reviewer", line 1; from Collected Poems (London: Cresset Press, 1954) p. 112.

Morning Joe http://www.msnbc.com/morning-joe/watch/trump-ted-cruz-lies-he-s-a-liar-608990275597 (26 January 2016)
2010s, 2016, January

"Heart"
Goddess Gone Fishing for a Map of the Universe (2012)

“A man who says he feels no fear is either a fool or a liar.”
Unsourced

He said, 'No.'"
Muwatta of Malik ibn Anas, chapter 61, hadith number 19
Sunni Hadith

"Light My Fire" (1967). Because Jim Morrison sang this as a breakthrough hit for The Doors and was the group's primary songwriter, this is often mistakenly thought to have been written by him. It was actually written by guitarist Robby Krieger, as were some other songs including "Love Her Madly," "You're Lost Little Girl" and "Touch Me" (as well as some other songs on the Soft Parade album). The second verse of the song, however, was written by Morrison.
Misattributed

Obama vs. the Phobocracy http://www.washingtonpost.com/wp-dyn/content/article/2008/02/03/AR2008020302526.html, Washington Post (February 4, 2008)

1840s, Essays: First Series (1841), Prudence

“C++ is a language strongly optimized for liars and people who go by guesswork and ignorance.”
Re: is CLOS reall OO? http://groups.google.com/group/comp.lang.lisp/msg/917737b7cc8510e3 (Usenet article).
Usenet articles, C++
As quoted in Michael Scheuer's Non-Intervention http://non-intervention.com/1689/democrats-scourge-the-south-after-the-battle-flag-it%e2%80%99s-on-to-old-hickory/ (9 July 2015), by M. Scheuer.
2010s

http://www.movietome.com/people/86509/daniel-radcliffe/trivia.html

Cosmic Trigger II : Down to Earth (1991)

Ferenc Puskas before Hungary demolished England 6-3 at Wembley in 1953. BBC http://news.bbc.co.uk/sport2/hi/funny_old_game/6151022.stm

“I love truth, and wish to have it always spoken to me : I hate a liar. (translated by Thornton)”
Ego verum amo, verum vol mihi dici : mendacem odi.
Mostellaria, Act I, scene 3, line 26
Mostellaria (The Haunted House)

From an essay in The New York Times (“Blizzard of Lies”) http://archive.is/TgeI published 8 January 1996
Letter to H. R. Haldeman

“Who love my man, I'm a liar if I say I don't
But I'll quit my man, I'm a liar if I say I wont.”
Billie's Blues

Anita Sarkeesian UN Speech https://www.youtube.com/watch?v=V3m-bcaCVbM?t=7m56s (2015) @7:56

Scotland & The Scottish People https://books.google.com/books?id=NINHAAAAYAAJ&printsec=frontcover&dq=scotland+%26+the+scottish+people&hl=en&sa=X&ved=0CBwQ6AEwAGoVChMIuKPUmZGkyAIVQ5qACh0kewz7#v=onepage&q=scotland%20%26%20the%20scottish%20people&f=false
Source: The Root of the Righteous (1955), Chapter 34.

"What I Would Tell a Son," Family Weekly (14 July 1963).

August 3,1961, NDP Leadership Convention http://www.youtube.com/watch?v=IFmD3U2s7tI.

“[T]here is nothing that God hates so much as a liar.”
Chantal de Clergerie, p. 26
La joie (Joy) 1929
April 23, 2008 http://littlegreenfootballs.com/article/29712_Jimmy_Carter_Calls_Condi_Rice_a_Liar&only

“and liars kill their kind
but' her, my 'love creates love only' our”
Source: 1 x 1 (1944), XXXII
Stand up, Nigel Barton (1965)

As quoted in Land Your Dream Job : High-Performance Techniques to Get Noticed, Get Hired, and Get Ahead (2007) by John Middleton, Ken Langdon, and Nikki Cartwright

Majlisi, Bihārul Anwār, vol.53, p. 191
Religious-based Quotes
Regarding claims that the American Civil War was not about slavery; "After Words with Bruce Bartlett" http://www.c-span.org/video/?204475-1/words-bruce-bartlett (7 April 2008), C-SPAN
2000s

“The liar wants to be believed, but lying undermines the foundation for credibility.”
Source: Propaganda & The Ethics Of Persuasion (2002), Chapter Four, Ethics And Propaganda, p. 149

“He was brother to a liar and brother to an angel, son of a dream and son of a dreamer.”
About Ronan
The Raven Cycle Series, The Dream Thieves (2013)

David Lloyd George recounting Woodrow Wilson's opinion of Poincaré in 1923, quoted in David Lloyd George, The Truth about the Peace Treaties. Volume I (London: Victor Gollancz, 1938), p. 241.
About

http://server7.whiterosesociety.org/content/malloy/MalloyMemories/Beware_of_the_Prior_Generals.mp3
On Republicans
MSNBC http://www.msnbc.msn.com/id/15536263/, accessed November 5, 2006

“Make not Christ a liar in distrusting His promise.”
Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 594.

"Revised Historiography", Liberty Bell magazine (April 1980)
1970s, 1980s

“Sarah palin's latest makes her either a despicable liar or horribly uninformed.”
3:14 AM - 8 Aug 09 http://twitter.com/DavidShuster/status/3186603567
On Twitter

This is one of the most negative campaigns in history...
ABC This Week (October 7, 2012) http://abcnews.go.com/ThisWeek/video/week-1007-robert-gibbs-ed-gillespie-mitt-romney-17416989?tab=9482930§ion=1206874&playlist=17417528

Stephen Colbert to Viggo Mortensen, The colbert Report September 18, 2014

Source: 2010s, 2010, Decision Points (November 2010), p. 121

Patheos, Anti-theist Answers to Christian Questions http://www.patheos.com/blogs/reasonadvocates/2015/11/22/anti-theist-answers-to-christian-questions/ (November 22, 2015)

"Lying in Politics"
Crises of the Republic (1969)