Source: My Unfair Godmother
Quotes about mistake
page 7

“What a terrible mistake to let go of something wonderful for something real.”
Source: No One Belongs Here More Than You

Attributed in FBI Memo, February 13, 1950 (item 61-4099-25 in Einstein's FBI file—viewable online as p. 72 of "Albert Einstein Part 1 of 14" here http://vault.fbi.gov/Albert%20Einstein, as well as p. 72 of the pdf file which can be downloaded here http://vault.fbi.gov/Albert%20Einstein/Albert%20Einstein%20Part%201%20of%2014/at_download/file). There is no other information in the FBI's released files as to what source attributed this statement to Einstein, and the files are full of falsehoods, including the accusation that Einstein was secretly pro-communist, when in fact he was openly so Albert Einstein#Vierick Interview (1929)
Disputed
Context: In December, 1947, he made the following statement: "I came to America because of the great, great freedom which I heard existed in this country. I made a mistake in selecting America as a land of freedom, a mistake I cannot repair in the balance of my life."

“This is one of the disadvantages of wine, it makes a man mistake words for thoughts.”
28 April 1778, p. 659 http://books.google.com/books?id=yYphdZ0abhUC&q="One+of+the+disadvantages+of+wine+it+makes+a+man+mistake+words+for+thoughts"&pg=PA659#v=onepage
Life of Samuel Johnson (1791), Vol II
Source: The Life of Samuel Johnson LL.D. Vol 2
Source: Devil in Winter

“Judging the mistakes of strangers is an easy thing to do - and it feels pretty good.”
Source: Sputnik Sweetheart

Source: Walden & Civil Disobedience

“America is a mistake, admittedly a gigantic mistake, but a mistake nevertheless.”
Remark to Ernest Jones as quoted in The Life and Work of Sigmund Freud: Years of maturity, 1901-1919 (1957) by Ernest Jones, p. 60
Also quoted as, "Yes, America is gigantic, but a gigantic mistake." in Memories of a Psycho-analyst, ch.9 (1959) by Ernest Jones; and as, "America is the most grandiose experiment the world has seen, but I am afraid it is not going to be a success." in Freud: the Man and his Cause, pt. 3, ch. 12, (1980), by Ronald W. Clark; as quoted in Penguin Dictionary of Modern Quotations by Robert Andrews, Penguin Books, 2001.
Attributed from posthumous publications

Ein Fachmann ist ein Mann, der einige der gröbsten Fehler kennt, die man in dem betreffenden Fach machen kann, und der sie deshalb zu vermeiden versteht.
Der Teil und das Ganze. Gespräche im Umkreis der Atomphysik (1969); also in "Kein Chaos, aus dem nicht wieder Ordnung würde", Die Zeit No. 34 (22 August 1969); as translated in Physics and Beyond : Encounters and Conversation (1971)
Source: The Little Shop of Happy Ever After

Source: Leadership Gold: Lessons I've Learned from a Lifetime of Leading

“Nothing will stop you being creative more effectively as the fear of making a
mistake.”

“We all make mistakes but one has to move on.”

On the game of Golf in an interview with Nick Harper http://sport.guardian.co.uk/news/story/0,,1093850,00.html in The Guardian (28 November 2003).
Source: The Walk
Source: Bayou Moon
"God, a Poem", line 5, from Children in Exile (1983)

Travis Parker, Proloque, p. 3
2000s, The Choice (2007)

Howard Gardner (in Siegel & Shaughnessy, 1994), quoted in: Cara F. Shores (2011), The Best of Corwin: Response to Intervention, p. 51

(Berlin Institute of Advanced Studies, Nov 2005).
Attributed

Source: The Tamarisk Tree (1975), Ch. XIV

“don't spread the discontent
don't spread the lies
don't make the same mistakes
with your own life”
Song lyrics, Ophelia (1998), Break Your Heart
Phlogiston interview (1995)

Tell Her About It.
Song lyrics, An Innocent Man (1983)
Advice to the Poets (1731), p. 32
The Naked Communist (1958)

Gregory S. Paul (1988) Predatory Dinosaurs of the World, Simon and Schuster, p. 22
Predatory Dinosaurs of the World
Cconversation with W.C. Seitz, in Abstract Expressionist Painting in America, W.C, Seitz, Cambridge Massachusetts, 1983, p. 94
after 1970

Page 141
Post-Presidency, Our Endangered Values (2005)

2010s

Variations of this quote have been attributed to a number of people, including Eleanor Roosevelt, Samuel Levenson, and Lao Tzu; there is no solid support for any such attribution.
Misattributed

Viktor Schauberger, 1933 - Implosion Magazine, No. 2, p. 23. (Callum Coats: The Fertile Earth)
Callum Coats: The Fertile Earth

“Marriage is a very good thing, but I think it's a mistake to make a habit out of it.”
'"The Treasure"
Short Stories

“I mean you lie—under a mistake.”
Polite Conversation (1738), Dialogue 1
Source: Even a stone can be a teacher (1985), p. 106

Arthur Jensen, "The Debunking of Scientific Fossils and Straw Persons" http://www.mugu.com/cgi-bin/Upstream/jensen-gould-fossils Contemporary Education Review 1:2, 1982
Brazil v. Germany (8 July 2014).
2010s, 2014, 2014 FIFA World Cup

A Conversation with Ward Cunningham (2003), Working the Program

“It's all right to make mistakes, you're only human
Inside everybody's hiding something.”
Slide
Song lyrics, No Angel (1999)

Yehudi
Source: Yehudi Menuhin (1916-1999), Issue 372 http://newint.org/features/2004/10/01/yehudi-menuhin/, New Internationalist Magazine

“Mixing one's wines may be a mistake, but old and new wisdom mix admirably.”
The Singer, in The Caucasian Chalk Circle (1944), Prologue

Sermon to a prayer meeting in Niger (30 March 2007), quoted in Reuters UK (30 March 2007) "Gaddafi says only Islam a universal religion" by Salah Sarrar
Speeches
The Impact of Hitler. British Politics and British Policy, 1933-1940 (University of Chicago, 1977), p. 9.

“Never mistake the enthusiasm of the minority for the support of the majority.”
Harriet Harman, " A Woman's Work https://books.google.co.uk/books?id=ogtGDQAAQBAJ&pg=PT75&lpg=PT75&dq=neil+kinnock+%22never+mistake+the+enthusiasm+of+the+minority+for+the+support+of+the+majority%22&source=bl&ots=OpoPF2iMuC&sig=uVo7pu8ZjOjHVdXaVvDKeo4Lt94&hl=en&sa=X&sqi=2&ved=0ahUKEwj5veCHxbLSAhXlIcAKHTZIBU0Q6AEIGjAA#v=onepage&q=neil%20kinnock%20%22never%20mistake%20the%20enthusiasm%20of%20the%20minority%20for%20the%20support%20of%20the%20majority%22&f=false" (Penguin Books, 2017).

At the Washington Institute's Soref Symposium, April 29, 1991 http://web.archive.org/web/20041130090045/http://www.washingtoninstitute.org/pubs/soref/cheney.htm
1990s

Source: The Moral Judgment of the Child (1932), Ch. 2 : Adult Constraint and Moral Realism

Part 5: "The World of One Physicist", "The 7 Percent Solution", p. 255
Surely You're Joking, Mr. Feynman! (1985)

America...You Kill Me

“Mistakes are the inevitable lot of mankind.”
In re Taylor's Estate (1882) 22 Ch.D. 495, 503.

In this whole business I follow the steps of Augustine.
De causa Dei contra Pelagium

Said during his exile in Peking, as quoted by Oriana Fallaci (June 1973), Intervista con la Storia (sixth edition, 2011). pages 112-113.
Interviews

The Glenn Beck Program, April 12, 2013. Edited, including omission of some non-germane remarks. YouTube https://www.youtube.com/watch?v=xJk0XFlErTA
2010s

Source: Kritik der zynischen Vernunft [Critique of Cynical Reason] (1983), p. 58
Source: The Revival of Aristocracy (1906), p. 49.

2016, Remarks on Donald Trump and the 2016 race

p, 125
Dr. Wallis's Account of some Passages of his own Life (1696)

"The Testament of a Furniture Dealer" http://www.ikea.com/ms/en_US/pdf/reports-downloads/the-testament-of-a-furniture-dealer.pdf (1976).

Speech http://hansard.millbanksystems.com/commons/1967/jul/03/clause-8-restrictions-on-prosecution in the House of Commons in favour of the Bill decriminalising homosexuality (3 July 1967).
1960s

Source: December 2005. http://thestar.com.my/news/story.asp?file=/2005/12/11/nation/12838957&sec=nation

Everybody Loves You Now
Song lyrics, Cold Spring Harbor (1971)
Source: Argonautica (3rd century BC), Book II. Onward to Colchis, Lines 1015–1029

On Rawhides impact on his beginning acting career
Zmijewsky, Boris; Lee Pfeiffer (1982). The Films of Clint Eastwood. p. 20. Secaucus, New Jersey: Citadel Press. ISBN 0806508639.

“The world mistakes Palestinian military weakness for moral innocence.”
“Liar, liar, abaya on fire,” http://www.wnd.com/news/article.asp?ARTICLE_ID=27264 WorldNetDaily.com, April 17, 2002.
2000s

(J. Hudson Taylor. Separation and Service: Or Thoughts on Numbers VI, VII. London: Morgan & Scott, n.d., 105).

“If there were mistakes, there were mistakes. But a man has to have a line of work, no?”
Quoted in "Whiteout: The CIA, Drugs, and the Press" - Page 184 - by Alexander Cockburn, Jeffrey St. Clair - Political Science - 1998