Quotes about classification
A collection of quotes on the topic of classification, other, system, use.
Quotes about classification

Pour qu’un ensemble de sensations soit devenu un souvenir susceptible d’être classé dans le temps, il faut qu’il ait cessé d’être actuel, que nous ayons perdu le sens de son infinie complexité, sans quoi il serait resté actuel. Il faut qu’il ait pour ainsi dire cristallisé autour d’un centre d’associations d’idées qui sera comme une sorte d’étiquette. Ce n’est que quand ils auront ainsi perdu toute vie que nous pourrons classer nos souvenirs dans le temps, comme un botaniste range dans son herbier les fleurs desséchées.
Source: The Value of Science (1905), Ch. 2: The Measure of Time

Source: 1860s, Evidence as to Man's Place in Nature (1863), Ch.2, p. 128

Source: The Faces of Janus: Marxism and Fascism in the Twentieth Century, (2000), p. 5
Source: Classification and indexing in science (1958), Other Chapters, p. 147 Cited in: Madeline M. Henderson (1966) Cooperation, convertibility, and compatibility among information systems: a literature review. p. 72.

Patheos, The Cow http://www.patheos.com/blogs/reasonadvocates/2016/01/22/the-cow/ (January 22, 2016)
Source: Classification and indexing in science (1958), Chapter 1: The need for classification, p. 3.

Thought and Change (1964)

Letter to J. G. Gmelin (1747) as quoted by Jeffrey H. Schwartz, Sudden Origins: Fossils, Genes, and the Emergence of Species (1999)
Source: Fundamentals of measurement and representation of natural systems. (1978), Ch. 2. The Basic Formalism; Quoted in: Mikulecky, Donald C. " Robert Rosen: the well‐posed question and its answer‐why are organisms different from machines? http://www.people.vcu.edu/~mikuleck/PPRISS3.html." Systems Research and Behavioral Science 17.5 (2000): 419-432.
Source: Learning Strategies and Individual Competence (1972), p. 275.

Source: 1860s, Evidence as to Man's Place in Nature (1863), Ch.2, p. 83
Source: Classification and indexing in science (1958), Chapter 1: The need for classification, p. 3.
Source: The Classification Research Group 1952—1962 (1962), p. 138

and so on up to twenty-eight
Vishnu Purana (Book 3, Ch 3), in The Vishńu Puráńa: A System of Hindu Mythology and Tradition http://books.google.co.in/books?id=bkEpAAAAYAAJ, p. 219.
Sources
Source: The Classification Research Group 1952—1962 (1962), p. 127; As cited in Shawne D Miksa (2002) Pigeonholes and punchcards : identifying the division between library classification research and information retrieval research, 1952-1970. http://courses.unt.edu/smiksa/documents/Miksa_Dissertation_2002.pdf

On naval timber and arboriculture (1831), Appendix F, part II
Source: The evolution of management thought, 1972, p. 462-3 (in 2009 edition)

“Hence the most scientific classification is a rough-and-ready business at the best.”
Mysticism. A Study of the Nature and Development of Man's Spiritual Consciousness (1911)

1988)[Serendipity in the exploration of biodiversity, Biodiversity, National Academy Press, 98–105, https://books.google.com/books?id=MkUrAAAAYAAJ&pg=PA98] (quote from p. 98

1880s, The Future of the Colored Race (1886)
Source: Information history – an introduction (2009), p. 284; As cited in: Lyn Robinson and David Bawden (2011).

Source: 1930s, Principles of topological psychology, 1936, p. 12-13.
Source: Classification and indexing in science (1958), Chapter 1: The need for classification, p. 2.

Gino Severini, in a letter to Umberto Boccioni, Paris, 29 October 1912; as quoted in Futurism, ed. Didier Ottinger; Centre Pompidou / 5 Continents Editions, Milan, 2008, p. 55
Kenneth Boulding (1986) "What Went Wrong with Economics?" in: The American Economist Vol 30 (Spring) pp. 7-8, as cited in: Deirdre McCloskey (2013) " What Boulding Said Went Wrong with Economics, A Quarter Century On http://www.deirdremccloskey.com/editorials/boulding.php"
1980s

2014, Speech: Sponsorship Speech for the Supplemental Appropriations for FY 2014

Göran Asplund (1975), Strategy formulation: an intervention study of a complex group decision process. p. 22
"Why We Should Not Name Human Races—A Biological View", p. 231
Ever Since Darwin (1977)
In an interview with w:David Sylvester (1960), edited for BBC broadcasting: first published in 'Living Arts', April 1964; as quoted in Interviews with American Artists, by David Sylvester; Chatto & Windus, London 2001, p. 12
1960s
Brian Campbell Vickery (1970) Faceted Classification: A Guide to Construction and Use of Special Schemes. p. 20 as cited in: Claire Beghtol (1986) " Semantic Validity: Concepts of Warrant in Bibliographic Classification Systems http://downloads.alcts.ala.org/lrts/lrtsv30no2.pdf" Library Resources & Technical Services. Vol 30. p. 113.
Source: Classification and indexing in science (1958), Chapter 1: The need for classification, p. 11.
Source: Classification and indexing in science (1958), Chapter 1: The need for classification, p. 8; Partly cited in Nigerian Library and Information Science Review (1987). Vol 5-8. p. 44.

2014, Speech: Sponsorship Speech for the Supplemental Appropriations for FY 2014

Letter 2
Letters on Logic: Especially Democratic-Proletarian Logic (1906)

1860s, Our Composite Nationality (1869)
As cited in: Joseph E. Kasser (2010) " Seven systems engineering myths and the corresponding realities http://www.synergio.nl/media/59286/7_myths_of_se.pdf"
Towards a System of Systems Methodologies (1984)
Douglas Foskett (2000-04) " From Librarianship to Information Science http://faculty.libsci.sc.edu/bob/scrapbook/foskett2.htm" at

“Science is the systematic classification of experience.”
The Physical Basis of Mind (1877; repr. Boston: Houghton, Mifflin, 1891) p. 4

Source: The Wisdom of W.E.B. Du Bois (2003), p. 10
Source: Classification and indexing in science (1958), Chapter 1: The need for classification, p. 1; Partly cited in Jens-Erik Mai (2010) Classification in a social world: bias and trust http://jenserikmai.info/Papers/2010_Classificationinasocialworld.pdf Journal of Documentation Vol. 66 No. 5, 2010. p. 640; Also cited in ( Bawden, 1991 http://www.soi.city.ac.uk/~dbawden/reactionspaper.pdf).
Source: The Classification Research Group 1952—1962 (1962), p. 127
Source: The Classification Research Group 1952—1962 (1962), p. 133 as cited in:
Source: MDA Distilled. Principles of Model-Driven Architecture, 2003, p. 35-36.
Attributed to Foskett in: T. Tyaganatarajan (1961) "A study in the developments of colon classification." American Documentation. Vol 12 (4), p. 270
Source: Fifty years of information progress (1994), p. 7.
Source: The Classification Research Group 1952—1962 (1962), p. 137
Henri Poincaré, Critic of Crisis: Reflections on His Universe of Discourse (1954), Ch. 1. The Iconoclast

Loving v. Virginia http://www.amazon.com/Everyone-African-Science-Explodes-Myth/dp/1633880184/ref=asap_bc?ie=UTF8 (1967).
1960s
Whorf (1940) "Science and linguistics" in: MIT Technology Review Vol 42. p. 229-31.
Preface to third edition; Partly cited in: Vanda Broughton (2011) " Brian Vickery and the Classification Research Group: the legacy of faceted classification http://www.iskouk.org/conf2011/papers/broughton.pdf" p. 6
Classification and indexing in science (1958)

Source: 1930s, Sex and Temperament in Three Primitive Societies (1935), p. 321

Source: Legal foundations of capitalism. 1924, p. 351-352

Source: Sexual Personae: Art and Decadence from Nefertiti to Emily Dickinson (1990), p. 5

Source: The Geological Evidences of the Antiquity of Man (1863), Ch.21, p. 412
Source: Everyone is African: How Science Explodes the Myth of Race (2015), pp. 9–10.

Presentation at Carleton College, Nov 30 1960
David Reich, Who We Are and How We Got Here: Ancient DNA and the New Science of the Human Past, Knopf Doubleday Publishing Group, 2018, p.146

“For crude classifications and false generalisations are the curse of all organised human life.”
Source: A Modern Utopia (1905), Ch. 10, sect. 1

Source: Designing Social Systems in a Changing World (1996), p. 34-35, as cited in Alexander Laszlo and Stanley Krippner (1992) " Systems Theories: Their Origins, Foundations, and Development http://archive.syntonyquest.org/elcTree/resourcesPDFs/SystemsTheory.pdf" In: J.S. Jordan (Ed.), Systems Theories and A Priori Aspects of Perception. Amsterdam: Elsevier Science, 1998. Ch. 3, pp. 47-74.

Source: What On Earth Is About To Happen… For Heaven’s Sake? (2013), p. 80

Source: Presidential Address British Association for the Advancement of Science, Section A (1910), p. 290; Cited in: Moritz (1914, 27): The Nature of Mathematics.

"Judaism, Human Values and the Jewish State" (1995)
Source: Classification and indexing in science (1958), Chapter 1: The need for classification, p. 12-13.
"The Plot Against People," The New York Times (1968-06-18)

"9th Foundational Falsehood of Creationism" https://www.youtube.com/watch?v=Qfoje7jVJpU, Youtube (May 8, 2008)
Youtube, Foundational Falsehoods of Creationism

Speaking at Women's march in Los Angeles (21 January 2017).
Source: Models of Mental Illness (1984), p. 319 ( chapter online http://positivedisintegration.com/Weckowicz1984.pdf)

“No classification is complete and perfect for all purposes.”
Source: An approach to general systems theory (1969), p. 69.

" Arnold's corruption of Republican Party http://www.renewamerica.us/archives/columns/03_10_06wnd.htm", WorldNetDaily, October 6, 2003.
Miscellaneous
Source: Meeting the challenge (2009), p. xxvii.
Henri Poincaré, Critic of Crisis: Reflections on His Universe of Discourse (1954), Ch. 1. The Iconoclast
Preface to the first edition.
Classification and indexing in science (1958)
Brian Campbell Vickery (1999) " New Information Vistas http://faculty.libsci.sc.edu/bob/ISP/vickery2.htm".

Source: Object-oriented design: With Applications, (1991), p. 133

Defence of Criminals: A Criticism of Morality (1889)
Source: System Engineering (1957), p. 302; As cited in: Thomas C. Ford (2008) Interoperability Measurement. p. 146

"Science and Scientism", p. 115.
The Second Sin (1973)
Foskett (1959) "The Construction of a Faceted Classification for a Special Subject" in: Proceedings of the International Conference on Scientific Information. p. 867

Source: Introduction to semantics, 1962, p. 4

Methods of Study in Natural History (1863), ch. 1, p. 7 https://babel.hathitrust.org/cgi/pt?id=mdp.39015065771407;view=1up;seq=21

Mayr (1981) as cited in: C. Gnoli (2011) "Ontological foundations in knowledge organization: the theory of integrative levels applied in citation order". Scire actas. 17-1
Rebecca Wirfs-Brock (2003) in " An Interview with Rebecca Wirfs-Brock Author of Object Design http://www.objectsbydesign.com/books/RebeccaWirfs-Brock.html" 2003-2005 Objects by Design, Inc: Answer to the question Can you clarify what you consider to be the essential elements of a "conceptual view".

When asked about the email controversy.
Presidential campaign (April 12, 2015 – 2016), Democratic Presidential Debate in Miami (March 9, 2016)

A Conversation with Ward Cunningham (2003), Exploring with Wiki
Context: I'm not a fan of classification. It's very difficult to come up with a classification scheme that's useful when what you're most interested in is things that don't fit in, things that you didn't expect. But some people decided that every page should carry classification. They came up with a scheme, based on page names, to establish a classification structure for a wiki. And these people who care about classification maintain it.

An Old Man's Thoughts on Many Things, Of Education I
Context: If we want a subject that is nearer, I think botany is the best. I do not mean classification of plants. I mean their structure, growth, propagation, parts, and uses.... I know no other thing which presents the same facilities in the way of material, and the opportunities of seeing and handling it. I have heard that a great botanist, who lived in our time, used to teach some village children to gather and examine plants.

the latter often in situations where the art of heuristic programming has far outreached the special-case "theories" so grimly taught and tested — and invocations about programming style almost sure to be outmoded before the student graduates.
Turing Award Lecture "Form and Content in Computer Science" (1969) http://web.media.mit.edu/~minsky/papers/TuringLecture/TuringLecture.html, in Journal of the Association for Computing Machinery 17 (2) (April 1970)

As quoted in The United States Chess Federation profile http://main.uschess.org/content/view/142/195