“Never attempt to teach a pig to sing; it wastes your time and annoys the pig.”
Source: Time Enough for Love
A collection of quotes on the topic of pig, likeness, animals, animal.
“Never attempt to teach a pig to sing; it wastes your time and annoys the pig.”
Source: Time Enough for Love
Buffon, as quoted in Football Italia (07/01/07)
“Pride grows in the human heart like lard on a pig.”
“I am fond of pigs. Dogs look up to us. Cats look down on us. Pigs treat us as equals.”
                                        
                                        Christopher Soames, speech at the Reform Club (28 April 1981), reported in Martin S. Gilbert, Winston S. Churchill. Volume Eight: Never Despair: 1945–1965. p. 304 
Post-war years (1945–1955) 
Variant: I like pigs. Dogs look up to us. Cats look down on us. Pigs treat us as equals.  
Context: [Christopher Soames, Churchill's future son-in-law, remembered] Churchill showing him around Chartwell Farm [around 1946]. When they came to the piggery Churchill scratched one of the pigs and said: I am fond of pigs. Dogs look up to us. Cats look down on us. Pigs treat us as equals.
                                    
“Any Christian who is not a hero is a pig.”
Shouts and Whispers: Twenty-One Writers Speak about Their Writing and Their Faith, Jennifer L. Holberg, Wm. B. Eerdmans Publishing, 31 march 2006 Shouts and Whispers: Twenty-One Writers Speak about Their Writing and Their Faith, Jennifer L. Holberg, Wm. B. Eerdmans Publishing, 31 march 2006 https://books.google.com.br/books?id=MSHQwCakou0C&pg=PA153&dq=Leon+Bloy+any+christian+who+is+not+a+hero+is+a+pig&hl=pt-BR&sa=X&ved=0CBsQ6AEwAGoVChMIrt-3rLf5yAIVy5KQCh00zwt7#v=onepage&q=Leon%20Bloy%20any%20christian%20who%20is%20not%20a%20hero%20is%20a%20pig&f=false
Source: Thirteen Days: A Memoir of the Cuban Missile Crisis
“You can put lipstick on a pig. It's still a pig.”
DIE ZEIT, 30. August 2007, Zeit.de http://www.zeit.de/2007/36/Interview-Helmut-Schmidt?page=all
                                        
                                        Referring to his grandfather, Jerónimo Meirinho. 
Nobel Lecture (1998)
                                    
The Life, Martyrdom, and Selections from the Writings of Thomas Cranmer https://books.google.com/books?id=FvNeAAAAcAAJ&pg=PA3&lpg=PA3&dq=The+Life,+Martyrdom,+and+Selections+from+the+Writings+of+Thomas+Cranmer+...&source=bl&ots=LbXiMjz5Zp&sig=0pi5SHuxfdt_YUoiJcxvLgr7x5E&hl=en&sa=X&ved=0ahUKEwjzmZL_wsfaAhVl6YMKHWubBkcQ6AEILDAB by Thomas Cranmer, p.139-142, (1809)
                                        
                                        Letter to Gilbert Murray, April 3, 1902 
1900s
                                    
Eight or Nine Wise Words About Letter-Writing (1890)
                                        
                                        Quoted in The Nazi Party 1919-1945: A Complete History, Dietrich Orlow, New York: NY, Enigma Books, 2012, p 61. Goebbels’ article, “Nationalsozialisten aus Berlin und aus dem Reich”, Voelkischer Beobachter, February 4, 1927 
1920s
                                    
                                        
                                        Letter to Gilbert Murray, April 3, 1902 
1900s
                                    
Shaykh Abdur Rahmaan As-Sudays, 2007-03-19, April 19, 2002, www.alharamainsermons.org http://www.alharamainsermons.org/eng/modules.php?name=News&file=article&sid=71,.
Interview with Edney Silvestre, 2007.
                                        
                                        That’s all 
Nederland 2 documentary "The Night of Fortuyn"  https://www.youtube.com/watch?v=fgM9JozWOf0
                                    
“When you get in the mud with a pig, you get dirty and the pig gets happy.”
“I learned long ago never to wrestle with a pig. … You get dirty and besides the pig likes it.”
                                        
                                        Initially attributed to Cyrus S. Ching in Time, Vol. 56 (1950), p. 21. 
Misattributed 
Variant: Never wrestle with pigs. You both get dirty and the pig likes it.
                                    
“I was flying right toward him (the pig) at the speed of demigod-smashing.”
Source: The Last Olympian
                                
                                    “When you're given a brilliant child you polish her and let her shine.
Pigs in Heaven”
                                
                                
                                
                                
                            
Source: Dreams of a Dark Warrior
“No matter what has happened, you're not a pig-boy; you're an Assistant Pig Keeper!”
Source: The Black Cauldron
Source: The Complete Calvin and Hobbes
                                
                                    “Are you smarter than a pig, Locke?”
“On occasion,” said Locke. “There are contrary opinions.”
                                
                                
                                
                                
                            
Source: The Republic of Thieves
Source: Catch a Mate
“If wishes were wings, pigs would fly.”
                                        
                                        Old saying in Randland 
(15 October 1994) 
Source: The Eye of the World
                                    
“Sheriff of Rotingham King illegal forest to pig wild kill in it a is!”
Robin Hood: Men in Tights
Source: Principles of Scientific Management, 1911, p. 59.
“You could weave silk from pig bristles before you could make a man anything but a man.”
                                        
                                        Lini 
(15 September 1992)
                                    
                                        
                                        http://server7.whiterosesociety.org/content/malloy/MalloyShow-(06-09-2005).mp3 
reacting to Michael Chertoff talking about people that couldn't leave New Orleans before Hurricane Katrina. 
On Hurricane Katrina
                                    
The Education of Henry Adams (1907)
                                        
                                        -- 10/1/07 -- http://web.archive.org/20071008195655/kerneltrap.org/Linux/Pluggable_Security 
Attributed
                                    
Source: True Grit (1968), Chapter 3, p. 29 : thoughts of 'Mattie Ross'
"Pro Skater Mike Vallely On Being Vegan" https://www.punkglobe.com/mikevallelyinterview0816.php, interview with Punk Globe (August 2016).
Foreword https://books.google.it/books?id=h-9ARz2YAlgC&pg=PT5 to Diet for a New America by John Robbins (H J Kramer, 2011)
A speech given at Manchester UK (18 October 1897)
Review of 'What Darwin Got Wrong' by Jerry Fodor and Massimo Piattelli Palmarini (2010) http://www.theguardian.com/books/2010/feb/06/what-darwin-got-wrong.
                                        
                                         A dance of death in the West http://www.wnd.com/2015/11/a-dance-of-death-in-the-west/, excerpt from Government Zero. 
Government Zero: No Borders, No Language, No Culture (2015)
                                    
                                        
                                        February 1855 
1820s, Journals (1822–1863)
                                    
Saint George and the Damn Truth http://www.mobylives.com/Orwell_Reed.html
Chris Eubank http://observer.guardian.co.uk/osm/story/0,,1010013,00.html#article_continue
                                        
                                        Quote of Pissarro, in a letter, Paris, 5 December 1886, to his son Lucien; in Camille Pissarro - Letters to His Son Lucien ed. John Rewald, with assistance of  Lucien Pissarro; from the unpublished French letters; transl. Lionel Abel; Pantheon Books Inc. New York, second edition, 1943, p. 86 
1880's
                                    
Source: The Chronicles of Prydain (1964–1968), Book V : The High King (1968), Chapter 10 (King Math)
Miss Shangay Lily, Feminist Monologues for A Diva
English Fairy Tales (1890), Preface to English Fairy Tales, The Story of the Three Little Pigs
"Why I’m Vegan", in his official website Bizarro.com http://bizarro.com/why-im-vegan/
Euclid v. Ambler Realty Co., 272 U.S. 365, 388 (1926)
                                        
                                        Understanding Computers and Cognition: A New Foundation for Design (1986, with Fernando Flores), p. 105.
<sup>11</sup> See, for example Putnam's discussion of natural kinds in "Is semantics possible?" (1970).
                                    
                                        
                                        The Best of S. J. Perelman, Introduction (1947) 
The Introduction was written under the name "Sidney Namlerep".
                                    
The End of the Universe (2002)
Source: What On Earth Is About To Happen… For Heaven’s Sake? (2013), p. 46
From his Humanity show; quoted in "Ricky Gervais chooses vegan," Vegetarians of Washington (13 September 2017) https://vegofwa.org/tag/ricky-gervais/