Quotes about simple
page 3

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 411.

2009, Nobel Prize acceptance speech (December 2009)

Source: A General View of Positivism (1848, 1856), p. 169

Memoirs (London: Collins, 1958), pp. 543-544.

abcnews.go.com http://abcnews.go.com/International/wireStory/peace-prize-childrens-rights-met-praise-26098345

the conclusion of the historical Stern-Gerlach experiment, in The Method of Molecular Rays http://nobelprize.org/nobel_prizes/physics/laureates/1943/stern-lecture.html, Nobel Lecture, December 12, 1946.

As quoted in Japan-zone http://www.japan-zone.com/modern/tezuka_osamu.shtml

Cited in William Flavelle Monypenny and George Earle Buckle, The life of Benjamin Disraeli, Rarl of Beaconsfield, Vol. 6 (1920), p. 463, and in Henry W. Lucy, Memories of Eight Parliaments (1908), p. 66.
Sourced but undated

2009, A World without Nuclear Weapons (April 2009)

1900s, First Annual Message to Congress (1901)

Patheos, Correspondence with a Creationist http://www.patheos.com/blogs/reasonadvocates/2017/06/06/correspondence-with-a-creationist/ (June 6, 2017)

Letter to W. W. Norton, 17 February, 1931
1930s

As quoted by Morris Kline, Mathematics and the Physical World (1959) Ch. 25: From Calculus to Cosmic Planning, pp. 441–42.

Quote from Claude Monet par lui-meme – interview by Thiébault-Sisson / translated by Louise McGlone Jacot-Descombes; published in Le Temps newspaper, 26 November 1900
about Johan Jongkind, famous pre-impressionist landscape-painter of Dutch origin, painting then in Honfleur for some years and advising Monet then.
1900 - 1920

Twain, Mark - Christian Science: Book I. Chapter V http://www.classicreader.com/book/1286/6/

Expositions and Developments (1959), pp. 113-114
1950s

“If you think it's simple, then you have misunderstood the problem.”
Bjarne Stroustrup's FAQ: Did you really say that?, 2007-11-15 http://www.stroustrup.com/bs_faq.html#really-say-that,

2014, Sixth State of the Union Address (January 2014)

p, 125
"Ethan Brand" (1850)

as model for his painting 'Morning', 1884
Quote in Munch's letter to Olav Paulsen, September 1884; as cited in Edvard Much – behind the scream, w:Sue Prideaux; Yale University Press, New Haven and London, 2007, p. 53
1880 - 1895

General Relation of the Concept System of Thesis and Antithesis
Gesammelte Mathematische Werke (1876)

“How divine scripture should be interpreted,” On First Principles, book 4, chapter 2, Readings in World Christian History (2013), p. 70
On First Principles

"Kalashnikov, 90, decries 'criminal' use of rifle" by Dmitry Solovyov, at Reuters (26 October 2009) http://www.reuters.com/article/idUSLQ148454

http://www.insideworldsoccer.com/2013/06/jose-mourinho-cristiano-ronaldo-thinks-he-knows-everything.html
2013

“Later Admonition and Exhortation to the Brothers and Sisters of Penance,” Francis of Assisi: Early Documents, Volume 1, p. 48.

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

1910s, Address to the Knights of Columbus (1915)

“I make no doubt… that these rules are simple, artless, and natural.”
The Art of Persuasion

Interview: Chuck Dixon http://www.gothamwdeszczu.com.pl/en/2013/07/04/interview-chuck-dixon/ (July 4, 2013)

2011, Remarks at a Dedication Ceremony for the Martin Luther King, Jr., National Memorial (October 2011)

2016, Memorial Service for Fallen Dallas Police Officers (July 2016)

Quote from Corot's 'Notebooks', ca. 1856, as quoted in Artists on Art – from the 14th – 20th centuries, ed. by Robert Goldwater and Marco Treves; Pantheon Books, 1972, London, p. 241
1850s

2015, Commemoration of the 150th Anniversary of the 13th Amendment (December 2015)

April 30, 1945, quoted in "Memoirs: Ten Years And Twenty Days" - Page 442 - by Grand Admiral Karl Doenitz - History - 1997.

Rien ne saurait étonner un Américain. On a souvent répété que le mot "impossible" n’était pas français; on s’est évidemment trompé de dictionnaire. En Amérique, tout est facile, tout est simple, et quant aux difficultés mécaniques, elles sont mortes avant d’être nées. Entre le projet Barbicane et sa réalisation, pas un véritable Yankee ne se fût permis d’entrevoir l’apparence d’une difficulté. Chose dite, chose faite.
Source: From the Earth to the Moon (1865), Ch. III: Effect of the President's Communication

Source: Thought is Your Enemy (1990), Chapter III: The Robot Is Dreaming

2012, Remarks at Clinton Global Initiative (September 2012)

As quoted in Dirac: A Scientific Biography (1990), by Helge Kragh, p. 258
Source: [Kragh, Helge, Dirac: A Scientific Biography, https://books.google.co.uk/books?id=zXm1Bso1VREC&pg=PA258&lpg=PA258&dq=%22The+aim+of+science+is+to+make+difficult+things+understandable+in+a+simpler+way;+the+aim+of+poetry+is+to+state+simple+things+in+an+incomprehensible+way.+The+two+are+incompatible%22&source=bl&ots=OLeGFpZGCh&sig=VRga1I7FVl9UBpXi_oAq_-8u_ls&hl=en&sa=X&ved=0ahUKEwjBwLbbwdvVAhXIIMAKHZ_pCZQQ6AEIOTAD#v=onepage&q=%22The%20aim%20of%20science%20is%20to%20make%20difficult%20things%20understandable%20in%20a%20simpler%20way%3B%20the%20aim%20of%20poetry%20is%20to%20state%20simple%20things%20in%20an%20incomprehensible%20way.%20The%20two%20are%20incompatible%22&f=false, March 30, 1990, 258, December 6, 2017]

Section 1, paragraph 31, lines 3-8.
The Manifesto of the Communist Party (1848)

Source: Das Ressentiment im Aufbau der Moralen (1912), L. Coser, trans. (1961), pp. 100-101
Goldratt, E. M. (2008). The Choice https://en.wikipedia.org/wiki/The_Choice_(philosophy_book) North River Press. p. 157
GM I 2 p. 26
Source: Nietzsche and Philosophy (1962), p. 2

André-Marie Ampè, in André-Marie Ampère: Enlightenment and Electrodynamics http://books.google.co.in/books?id=QWZKQWB-sbQC&pg=PA159, Cambridge University Press, 1996, p. 159

Huey Long on African American Education (Williams p. 524)

Galen, On the Doctrines of Hippocrates and Plato,: PHP III 8.35.1-11 translation: De Lacy, Phillip (1978- 1984) Galen, On the Doctrines of Hippocrates and Plato, Berlin. p. 233; cited in: Christopher Jon Elliott. "Galen, Rome and the Second Sophistic." p. 147-8.

Concepts

Campaign address in Beaverton, Oregon (9 May 2008) http://www.barackobama.com/2008/05/09/remarks_of_senator_barack_obam_63.php
2008

Quote is actually from Tom Peters: The Best Corporate Strategy? None, Of Course. Chicago Tribune July 11, 1994 http://articles.chicagotribune.com/1994-07-11/business/9407110026_1_silicon-graphics-customers-richard-branson
Misattributed

74
The Gardener http://www.spiritualbee.com/love-poems-by-tagore/ (1915)
Rudiger Dornbusch, "Expectations and exchange rate dynamics." The journal of political economy (1976): 1161-1176. p. 1161

Oprah’s Interview with Tina Turner http://www.oprah.com/omagazine/Oprahs-Interview-with-Tina-Turner/10, 2005, page 10

But — this little book must be true to its title.
Marginalia http://www.easylit.com/poe/comtext/prose/margin.shtml (November 1844)

"How I Write", The Writer, September 1954
1950s

“I offer nothing more than simple facts, plain arguments, and common sense.”
1770s, Common Sense (1776)

“By simple common sense I don't believe in God, in none.”
This phrase seems to have been first mentioned in Manual of a Perfect Atheist by Mexican writer Eduardo Garcia Del Rio, in 1989, without indicating any original source, which does make this quote unreliable. The quote has been widely circulated by atheists to try to prove that Chaplin was also one of them. However, taking into account what Chaplin himself wrote in his autobiography, when he was 75 years old, and what his family members wrote about him, calling Chaplin an atheist seems untenable. (http://www.adherents.com/people/pc/Charlie_Chaplin.html) According to his son, Charles Chaplin, Jr., in his book "My Father, Charlie Chaplin", pages 239-240, Chaplin was not an atheist; he quotes him saying: "I'm not an atheist"… "I can remember him saying on more than one occasion. 'I'm definitely an agnostic. Some scientists say that if the world were to stop revolving we'd all disintegrate. But the world keeps on going. Something must be holding us all in place — some Supreme Force. But what it is I couldn't tell you.". See also pages 210-211 of the book.
Disputed

1910s, The Philosophy of Logical Atomism (1918)

Alice's Adventures Under Ground (1886), Introduction, p. v

Letter to James F. Morton (January 1931), in Selected Letters III, 1929-1931 edited by August Derleth and Donald Wandrei, p. 253
Non-Fiction, Letters, to James Ferdinand Morton, Jr.

1910s, Address to the Knights of Columbus (1915)

Source: Quest for Truth (1999), P.353.

2004, Democratic National Convention speech (July 2004)

Depuis le premier jour jusqu'au dernier, il est le même, toujours le même, majestueux et simple , infiniment sévère et infiniment doux ; dans un commerce de vie pour ainsi dire public, Jésus ne donne jamais de prise à la moindre critique; sa conduite si prudente ravit l'admiration par un mélange de force et de douceur.

2014, Address to European Youth (March 2014)

[Renormalizability of Gauge Theories, Phys. Rev., 127, 331, 1 July 1962, https://doi.org/10.1103/PhysRev.127.331]

Second Dialogue; translated by Judith R. Bush, Christopher Kelly, Roger D. Masters
Dialogues: Rousseau Judge of Jean-Jacques (published 1782)

That is the true genius of America—a faith in simple dreams, an insistence on small miracles.
2004, Democratic National Convention speech (July 2004)