Source: Principles of Gestalt Psychology, 1935, p. 176
Context: Even these humble objects reveal that our reality is not a mere collocation of elemental facts, but consists of units in which no part exists by itself, where each part points beyond itself and implies a larger whole. Facts and significance cease to be two concepts belonging to different realms, since a fact is always a fact in an intrinsically coherent whole. We could solve no problem of organization by solving it for each point separately, one after the other; the solution had to come for the whole. Thus we see how the problem of significance is closely bound up with the problem of the relation between the whole and its parts. It has been said: The whole is more than the sum of its parts. It is more correct to say that the whole is something else than the sum of its parts, because summing is a meaningless procedure, whereas the whole-part relationship is meaningful.
“The whole is simpler than its parts.”
Quoted by Irving Fisher in "The Applications of Mathematics to the Social Sciences," Bulletin of the American Mathematical Society 36, 225-243 (1930). Full article http://projecteuclid.org/euclid.bams/1183493954
Attributed
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Josiah Willard Gibbs 11
physicist 1839–1903Related quotes

“The whole is greater than the sum of its parts.”

“A system is more than the sum of its parts; it is an indivisible whole.”
It loses its essential properties when it is taken apart. The elements of a system may themselves be systems, and every system may be part of a larger system.
Ackoff (1973) "Science in the Systems Age: beyond IE, OR and MS." in: Operations Research Vol 21, pp. 664.
1970s
Source: Information, The New Language of Science (2003), Chapter 7, A Battle Among Giants, Reductionism and emergence, p. 54

Cited in: Can Alpaslan, Ian Mitroff (2011) Swans, Swine, and Swindlers: Coping with the Growing Threat of Mega-Crises and Mega-Messes. p. 16.
1970s, The future of operational research is past, 1979

Writing for the court, United States v. Powers, 307 U.S. 214 (1939)
Judicial opinions
Source: 1920s, Kritische Theorie der Formbildung (1928, 1933), p. 305; as cited in: Cliff Hooker ed. (2011) Philosophy of Complex Systems. p. 189

Source: The Alphabet of Grace

“And the whole [is] greater than the part.”
Καὶ τὸ ὅλον τοῦ μέρους μεῖζον
ἐστιν
Elements, Book I, Common Notion 8 (5 in certain editions)
Cf. Aristotle, Metaphysics, Book Η 1045a 8–10: "… the totality is not, as it were, a mere heap, but the whole is something besides the parts … [πάντων γὰρ ὅσα πλείω μέρη ἔχει καὶ μὴ ἔστιν οἷον σωρὸς τὸ πᾶν]"
Euclid’s Elements