March 17
Quotes from Daily Negations (2007)
Quotes about fool
page 13

Tahrīr al-Wasīla vol. 1
Foreign policy

“Any fool can criticize, condemn, and complain — and most fools do.”
Attributed in various post-2000 works, but actually Dale Carnegie in How to Win Friends and Influence People p.14 http://books.google.com/books?id=yxfJDVXClucC&pg=PA14&dq=fool, published in 1936. (N.B. Carnegie is quoting Franklin immediately prior to writing this, so attribution could be due to a printing error in some edition).
Misattributed

“The wise men were all fools, what to do?”
"Last to Die"
Song lyrics, Magic (2007)

“It is unsafe to take your reader for more of a fool than he is.”
Ten Novels and Their Authors (1954)

Source: 1950 - 1960, Interview with David Sylvester, BBC (March 1960), pp. 95
The Complete Neurotic's Notebook (1981), Unclassified
Source: The Peter Principle (1969), p. 36 cited in: James Ike Schaap (2011)

Wish I Didn't Know Now.
Song lyrics, Toby Keith (1993)

Song lyrics, Highway 61 Revisited (1965), Positively 4th Street
“Hey fool, this ain't no football game!”
A-Team
Quotes from acting

Per Ahlmark, Former Deputy Prime Minister of Sweden (Liberal Party), in The Washington Times, November 1, 2002. http://web.archive.org/web/20030412193910/http://www.washtimes.com/commentary/20021101-47209425.htm

A Letter from Artemisia in Town to Chloe in the Country (1679)

“I have always observed that to succeed in the world one should appear like a fool but be wise.”
J'ai toujours vu que, pour réussir dans le monde, il fallait avoir l'air fou et être sage.
Pensées Diverses

“What fools call “wasting time” is most often the best investment.”
Source: The Bed of Procrustes: Philosophical and Practical Aphorisms (2010), p. 24

Book I, Canto VI, IV A Riddle Solved.
The Angel In The House (1854)

“A fool puts her hand into a hollow tree without finding out what’s inside first.”
Lini
(15 October 1993)
Source: The Stone That Never Came Down (1973), Chapter 16 (p. 124)

She-Gallants; reported in Hoyt's New Cyclopedia Of Practical Quotations (1922), "Women", p. 886-97.

“A fool always finds one still more foolish to admire him.”
Un sot trouve toujours un plus sot qui l'admire.
Variant A fool always finds a greater fool to admire him.
Canto I, l. 232
The Art of Poetry (1674)

Source: Words of a Sage : Selected thoughts of African Spir (1937), p. 38.

Source: Short fiction, Companions on the Road (1975), Chapter 1, “Avillis” (p. 4)

“There was a time when a fool and his money were soon parted, but now it happens to everybody.”
As quoted in The Stevenson Wit (1965) edited by Bill Adler

1960s, Why Jesus Called A Man A Fool (1967)

Toast in The Callahan Chronicals (1996) [originally published as Callahan and Company (1988)], Part IV : Earth … and Beyond, "Post Toast", p. 392

Mad Dogs and Englishmen (1930)

Journal of Discourses, 1:187-188 (June 19, 1853)
1850s

“Fool that I was to trust a Frenchman!”
"Rattle of Bones" (1929)

[...] "Give me man, and man alone" said Oblomov. "And, having given me him, do you try to love him."
"Oblomov", Part I Chapter II by I. Goncharov, translated by C. J. Hogarth

1916, Dada Manifesto (1916)

“We are all fools sometimes, child, yet a wise woman learns to limit how often.”
Lelaine Akashi to Nynaeve al'Meara
(15 October 1994)

“The fools enjoy their careless pleasure,
But their way is dark and leads to danger.”
Source: "Encountering Sorrow" (trans. David Hawkes), Line 17

I Love This Bar, written with Scotty Emerick
Song lyrics, Shock'n Y'all (2003)

“1599. Fortune favours Fools.”
Introductio ad prudentiam: Part II (1727), Gnomologia (1732)
“Erasmus’s Praise of Folly: Rivalry and Madness,” Neophilologus 76 (1992), p. 1

pg. 344
The Sports and Pastimes of the People of England (1801), Festival of Fools

“Must I always be waiting, waiting on you?
Must I always be playing, playing the fool?”
Sitting.
Song lyrics, In Between Dreams (2005)

Source: Social Problems (1883), Ch. 13 : Unemployed Labor
famous cat quotes
Bucky Katt's Big Book of fun, page 114
Bucky Katt

Source: Epigrams, p. 371

The Islanders http://whitewolf.newcastle.edu.au/words/authors/K/KiplingRudyard/verse/p1/islanders.html, l. 22-31 (1902).
Other works

1960's, Conversations with Samuel Beckett and Bram van Velde' (1965 - 1969)

Sketch of Life of Samuel Rutherford (Andrew Bonar)

“Logical consequences are the scarecrows of fools and the beacons of wise men.”
1870s, On the Hypothesis that Animals are Automata, and Its History (1874)

“A brave man is one who admits his fear. Only a fool believes himself invincible.”
Source: Ripping Time (2000), Chapter 10 (p. 300)

Alboine, Act 1, Scene 1.
Rosamund, Queen of the Lombards (1899)

Song lyrics, Blonde on Blonde (1966), Stuck Inside of Mobile with the Memphis Blues Again

“Some fool or some trigger happy judicial finger.”
On the NIRC Judge Sir John Donaldson (Hansard, 7 May 1974, Col. 239)
1970s

So, that's the way I look at medical healing.
To Kim Tinkham, who wrote Oprah that she watched her show about The Secret, was diagnosed with stage 3 breast cancer, and decided to heal herself instead of a mastectomy and chemotherapy that four doctors told her she urgently needed, on The Oprah Winfrey Show (March 2007) · YouTube video http://www.youtube.com/watch?v=7uf-5yuRiPs

Pour juger un homme, au moins faut-il être dans le secret de sa pensée, de ses malheurs, de ses émotions; ne vouloir connaître de sa vie que les événements matériels, c'est faire de la chronologie, l'histoire des sots!
The Wild Ass’s Skin (1831), Part II: A Woman Without a Heart

“Characters,” p. 304
Pretexts: Reflections on Literature and Morality (1964)
“Visionaries of uncomfortable truths are mostly dismissed as fools.”
Unsourced

Main Street and Other Poems (1917), The Robe of Christ

“He that will teach himself in school, becomes a scholar to a fool.”
Qui se sibi magistrum constituit, stulto se discipulum subdit.
Epistola LXXXVII, sect. 7; translation from Notes and Queries, 3rd series, vol. 11, p. 192
How Children Learn (1967).

To Leon Goldensohn (30 March 1946). Quoted in "The Nuremberg Interviews" by Leon Goldensohn, Robert Gellately - History - 2004.
1940s

[Proverbs, 19:13, KJV] (KJV)
Variant translation:

Source: Selected Essays (1904), "Priest and Prophet" (1893), pp. 130-131

Metropolis (1908)

“Several people have told me that my inability to suffer fools gladly is one of my main weaknesses.”
Dijkstra (1978) The pragmatic engineer versus the scientific designer http://www.cs.utexas.edu/users/EWD/transcriptions/EWD06xx/EWD690.html (EWD 690).
1970s

Song lyrics, Never for Ever (1980)

F 69
Aphorisms (1765-1799), Notebook F (1776-1779)

Quoted in Clarence P. Dresser, "Vanderbilt in the West" New York Times (9 October 1882).
Disputed
Source: Dream of the Red Chamber (1958), p. 4

“A wise man told me don't argue with fools
Cause people from a distance can't tell who is who”
Takeover
The Blueprint 2: The Gift & The Curse (2002)

version in original Dutch (origineel citaat van Hendrik Werkman, in het Nederlands): Er komt dan op een gegeven ogenblik een tijd dat je alles, de hele rotzooi van je aftrapt en opgelucht de verdere weg bewandelt. Dan krijg je de verleidingen: zal ik dat toch maar niet anders doen, zal ik omkeren en gaan inzien dat ik een stommeling ben. Bijt dan maar op de tanden en zeg tegen jezelf: nee, stommeling, niet terug, wat je verliest is winst.
Quote of Werkman, 1940's; as cited in 'Kwartierstaat', ed. Hartog, Van der Ley and Poortinga, Archief 3, Gebroeders & Cie, Amsterdam, (transl: Fons Heijnsbroek) unpaged
1940's

Things like that.
Simon O'Hagan "Credo:Peter Blake", http://www.findarticles.com/p/articles/mi_qn4159/is_20051120/ai_n15851377 The Independent on Sunday, 2005-11-20. Accessed from findarticles.com, 2007-01-22
Life

As quoted in Saudi Arabia using anti-terror laws to detain and torture political dissidents, UN says https://www.independent.co.uk/news/world/middle-east/saudi-arabia-torture-political-dissidents-anti-terror-laws-un-mohammad-bin-salman-a8388226.html (8 June 2018), The Independent.