Quotes about mind
page 11

"Self-Interview", originally appeared in The Paris Review no. 69 (1977)
Palm Sunday (1981)

“Does the body rule the mind or does the mind rule the body?
I dunno…”
From the song "Still Ill"
From songs

“In either case the orator should bear clearly in mind throughout his whole speech what the fiction is to which he has committed himself, since we are apt to forget our falsehoods, and there is no doubt about the truth of the proverb that a liar should have a good memory.”
Vtrubique autem orator meminisse debebit actione tota quid finxerit, quoniam solent excidere quae falsa sunt: verumque est illud quod vulgo dicitur, mendacem memorem esse oportere.
Book IV, Chapter II, 91; translation by H. E. Butler
Compare: "Liars ought to have good memories", Algernon Sidney, Discourses on Government, chapter ii, section xv.
Alternate translation for "solent excidere quae falsa sunt": False things tend to be forgotten
De Institutione Oratoria (c. 95 AD)

Source: Speech to the Conservatives of Manchester (3 April 1872) on the monarchy, quoted in William Flavelle Monypenny and George Earle Buckle, The Life of Benjamin Disraeli, Earl of Beaconsfield. Volume II. 1860–1881 (London: John Murray, 1929), p. 527.

“Whatever you do, wherever you may be, ever bear this in mind that I am always of everything you do”
Saying stated to his disciples

Lego House, written with Jake Gosling and Chris Leonard.
Song lyrics, + (2011)

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

Source: Striking Thoughts (2000), p. 9

Source: Gamasutra.com (members only)

Anarchy and Alchemy: the Films of Alejandro Jodorowsky by Ben Cobb (2007) p. 115

And so it is.
1990s and later, "The Institutional Structure of Production" (1992)

Text of a letter written following his Hajj (1964)

Remarks of Senator Barack Obama: The Great Need of the Hour (January 20, 2008 in Atlanta, Georgia) http://www.reobama.com/SpeechesJan2008.htm
2008

2018, Nelson Mandela Annual Lecture (2018)

§ 2.54
Yoga Sutras of Patañjali

Eugenics, academic and practical. Eugenics Review, 27, 95-100, 1935.
The original has ‘to store it as’ inserted before the final words ‘a warehouse’, likely a mistake left from an earlier draft.
1930s

“What's loftiest in the mind can only live through growth.”
Lucretius, p. 171
Dialogue de l'arbre (1943)

Reported in Josiah Hotchkiss Gilbert, Dictionary of Burning Words of Brilliant Writers (1895), p. 241

“Great minds discuss ideas, average minds discuss events, small minds discuss people.”
Some evidence for Henry Buckle (1821-1862) as the source: see p.33 quotation https://books.google.com/books?id=2moaAAAAYAAJ&q=buckle#v=snippet&q=buckle&f=false
There are many published incidents of this as an anonymous proverb since at least 1948, and as a statement of Eleanor Roosevelt since at least 1992, but without any citation of an original source. It is also often attributed to Admiral Hyman G. Rickover but, though Rickover quoted this, he did not claim to be the author of it; in "The World of the Uneducated" in The Saturday Evening Post (28 November 1959), he prefaces it with "As the unknown sage puts it..."
Great minds discuss ideas, average minds discuss events, and little minds discuss people.
In this form it was quoted as an anonymous epigram in A Guide to Effective Public Speaking (1953) by Lawrence Henry Mouat
New York times Saturday review of books and art, 1931: ...Wanted, the correct quotation and origin of this expression: Great minds discuss ideas, average minds discuss events, small minds discuss people...
Several other variants or derivatives of the expression exist, but none provide a definite author:
Great minds discuss ideas, mediocre minds discuss events, small minds discuss personalities.
Great minds discuss ideas
Average minds discuss events
Small minds discuss people
Small minds discuss things
Average minds discuss people
Great minds discuss ideas
...Be less curious about people and more curious about ideas. (Marie Curie, undated (died 1934), as quoted in Living Adventures in Science by Henry and Dana Lee Thomas, 1972)
...Some professor of psychology who has been eavesdropping for years makes the statement that "The best minds discuss ideas; the second in ranking talk about things; while the third group, or the least in mentality, gossip about people"… (Hardware age, Volume 123, 1929)
...He now reports that, "the best minds discuss ideas; the second ranking talks about things; while the third and lowest mentality – starved for ideas – gossips about people." (Printers' Ink, Volume 139, Issue 2, 1927, p. 87)
...It has been said long ago that there were three classes of people in the world, and while they are subject to variation, for elemental consideration they are useful. The first is that large class of people who talk about people; the next class are those who talk about things; and the third class are those who discuss ideas... (H. J. Derbyshire, "Origin of mental species", 1919)
...Mrs. Conklin points out certain bad conversational habits and suggests good ones, quoting Buckle's classic classification of talkers into three orders of intelligence — those who talk about nothing but persons, those who talk about things and those who discuss ideas... (review of Mary Greer Conklin's book Conversation: What to say and how to say it in The Continent, Jan. 23, 1913, p. 118)
...[ Henry Thomas Buckle's ] thoughts and conversations were always on a high level, and I recollect a saying of his which not only greatly impressed me at the time, but which I have ever since cherished as a test of the mental calibre of friends and acquaintances. Buckle said, in his dogmatic way: "Men and women range themselves into three classes or orders of intelligence; you can tell the lowest class by their habit of always talking about persons, the next by the fact that their habit is always to converse about things; the highest by their preference for the discussion of ideas"… (Charles Stewart, "Haud immemor. Reminescences of legal and social life in Edinburgh and London. 1850-1900", 1901, p. 33 http://www.mocavo.com/Haud-Immemor-by-Charles-Stewart-Reminiscences-of-Life-in-Edinburgh-and-London-1850-1900/608008/13?browse=true#63).
Disputed

Letter to Benjamin Harrison V (9 March 1789), published in Washington's Writings: Being His Correspondence, Addresses, Messages, and Other Papers, Official and Private, Selected and Published from the Original Manuscripts https://play.google.com/store/books/details?id=DTlEAQAAMAAJ&rdid=book-DTlEAQAAMAAJ&rdot=1, Volume IX, p. 475.
1780s
The Man who Tapped the Secrets of the Universe

Pericles commenting the participation of Athenian citizens in politics, as quoted in Models of Democracy (2006) by David Held, Stanford University Press, p. 14. Book II, chapter 40.

Speech http://hansard.millbanksystems.com/commons/1846/may/15/corn-importation-bill-adjourned-debate in the House of Commons (15 May 1846).
1840s

The Quintessence of Nehru (1961) edited by K. T. Narasimhachar, p. 120
#127
Vectors: Aphorisms and Ten Second Essays (2001)

“When in Love,
body, mind, heart and soul don't even exist.”
Hush Don't Say Anything to God (1999)

An Acre of Grass http://poetry.poetryx.com/poems/1438/, st. 2
Last Poems (1936-1939)

Mendel makes several allusions to biblical verses, including John 20:15, Matthew 25:26 and John 10:10.
Sermon on Easter
Original: Jesus erschien den Jüngern nach der Auferstehung in verschiedener Gestalt. Der Maria Magdalena erschien er so, daß sie ihn für einen Gärtner halten mochte. Sehr sinnreich sind diese Erscheinungen Jesu und unser Verstand vermag sie schwer zu durchdringen. (Er erscheint) als Gärtner. Dieser pflanzt den Samen in den zubereiteten Boden. Das Erdreich muss physikalisch-chemisch Einwirkung ausüben, damit der Same aufgeht. Doch reicht das nicht hin, es muß noch Sonnenwärme und Licht hinzukommen nebst Regen, damit das Gedeihen zustandekommt. Das übernatürliche Leben in seinem Keim, der heiligmachenden Gnade wird in die von der Sünde gereinigte, also vorbereitete Seele des Menschen hineingesenkt und es muß der Mensch durch seine guten Werke dieses Leben zu erhalten suchen. Es muss noch die übernatürliche Nahrung dazukommen, der Leib des Herrn, der das Leben weiter erhält, entwickelt und zur Vollendung bringt. So muss Natur und Übernatur sich vereinigen, um das Zustandekommen der Heiligkeit des Menschen. Der Mensch muß sein Scherflein Arbeit hinzugeben, und Gott gibt das Gedeihen. Es ist wahr, den Samen, das Talent, die Gnade gibt der liebe Gott, und der Mensch hat bloß die Arbeit, den Samen aufzunehmen, das Geld zu Wechslern zu tragen. Damit wir »das Leben haben und im Überflusse haben.

Boisgeloup, winter 1934
Richard Friedenthal, (1963, p. 256).
Quotes, 1930's, "Conversations avec Picasso," 1934–35

“For if vicious propensity is, as it were, a disease of the soul like bodily sickness, even as we account the sick in body by no means deserving of hate, but rather of pity, so, and much more, should they be pitied whose minds are assailed by wickedness, which is more frightful than any sickness.”
Nam si uti corporum languor ita vitiositas quidam est quasi morbus animorum, cum aegros corpore minime dignos odio sed potius miseratione iudicemus, multo magis non insequendi sed miserandi sunt quorum mentes omni languore atrocior urguet improbitas.
Prose IV; line 42; translation by H. R. James
Alternate translation:
For as faintness is a disease of the body, so is vice a sickness of the mind. Wherefore, since we judge those that have corporal infirmities to be rather worthy of compassion than of hatred, much more are they to be pitied, and not abhorred, whose minds are oppressed with wickedness, the greatest malady that may be.
The Consolation of Philosophy · De Consolatione Philosophiae, Book IV

Introduction https://en.wikisource.org/wiki/The_Fraud_of_Feminism/Introduction
The Fraud of Feminism (1913)

Part II, p. 29
A Jewish Writer in America (2011)

2008, A More Perfect Union (March 2008)

as quoted in The Origin of Negative Dialectics (Free Press: 1977), p. 187

"Longtime Vegan Bellamy Young: Variety Is Infinite", video interview with PETA (10 February 2016) https://www.youtube.com/watch?v=cLjdSQqq52o.

General Security: The Liquidation of Opium (1925)

"Speke", from Kensington Gardens (London: Ernest Benn, [1924] 1927) p. 50.

Comment on Benito Mussolini in 1933, as quoted in Three New Deals : Reflections on Roosevelt's America, Mussolini's Italy, and Hitler's Germany, 1933-1939 (2006) by Wolfgang Schivelbusch, p. 31
1930s

“None, none descends into himself, to find
The secret imperfections of his mind.”
Ut nemo in sese tentat descendere! nemo!
Sed praecedenti spectatur mantica tergo.
Satire IV, line 23 (translated by John Dryden).
The Satires

“I just remembered that I'm absent minded… wait, I mean I lost my mind, I can't find it.”
"Cum On Everybody" (Track 13).
1990s, The Slim Shady LP (1999)

Speech after the London Bridge attack (4 June 2017)

On Education, Especially in Early Childhood (1926), Ch. 2: The Aims of Education, p. 36.No one gossips about other people's secret virtues.
1920s

"Canada: 'A model for the world', in The Globe and Mail (2 February 2002)

Majlisi, Bihārul Anwār, vol.46, p. 109.

Gramsci cited in Davidson, 1977, p. 70.

“Happiness is beneficial for the body but it is grief that develops the powers of the mind.”
Le bonheur est salutaire pour le corps, mais c'est le chagrin qui développe les forces de l'esprit.
Source: In Search of Lost Time, Remembrance of Things Past (1913-1927), Vol. VII: The Past Recaptured (1927), Ch. III: "An Afternoon Party at the House of the Princesse de Guermantes"

"On Denoting", Mind, Vol. 14, No. 56 (October 1905), pp. 479–493; as reprinted in Logic and Knowledge: Essays, 1901–1950, (1956)
1900s

As quoted in "The 90%" http://archive.indianexpress.com/news/the-90-/934145/0, The Indian Express (9 April 2012)

Source: Regards sur le monde actuel [Reflections on the World Today] (1931), p. 55

Source: Outlines of a Philosophy of Art, 1925, p. 7

Diogenes Laërtius (trans. C. D. Yonge) The Lives and Opinions of Eminent Philosophers (1853), "Solon", sect. 13, p. 29.

Loving: Act 3, Scene 1.
Days Without End (1933)

Letter to the Chancellors of the European Universities. Collected Works, vol. 1, pt. 2 (1956, trans. 1968).

Omar Khayyám, Rubaiyat (1048–1123), translation by Richard Le Gallienne
Well, well, what matters it! believe that too. note: Not a literal translation of Omar Khayyám's work, but a paraphrase according to Richard Le Gallienne own understanding.
Source: https://static1.squarespace.com/static/525669afe4b0b689af6075bc/t/525e8a8ee4b0f0a0fb6fa309/1381927566101/Talib+--+Le+Gallienne%27s+Paraphrase+and+the+Limits+of+Translation+from+FitzGerald+Rubaiyat+volume.pdf pp. 175-176
https://www.cambridge.org/core/books/fitzgeralds-rubaiyat-of-omar-khayyam/le-galliennes-paraphrase-and-the-limits-of-translation/CC05D35479CE33C2E66ABA8CF51F779B Le Gallienne's Paraphrase and the Limits of Translation']' by Adam Talib

Circular Letter to the Governours of the several States (18 June 1783). Misreported as "I make it my constant prayer that God would most graciously be pleased to dispose us all to do justice, to love mercy, and to demean ourselves with that charity, humility, and pacific temper of mind, which were the characteristics of the Divine Author of our blessed religion; without a humble imitation of whose example in these things, we can never hope to be a happy nation", in Josiah Hotchkiss Gilbert, Dictionary of Burning Words of Brilliant Writers (1895), p. 315
1780s

In Memory Of Major Robert Gregory, st. 12
The Wild Swans at Coole (1919)

Discourse V, pt. 9.
The Idea of a University (1873)

After some fifty or sixty repetitions, this remark ceased to amuse me.
Source: 1950s, Portraits from Memory and Other Essays (1956), p. 9

p, 125
"Ethan Brand" (1850)