Source: Systems Engineering Tools, (1965), Systems Engineering Methods (1967), p. 70; First sentences of Ch. 3. Formulating and Structuring the System
In this text Harold Chestnut is here citing:
C. West Churchman, Russell L. Ackoff, and E. Leonard Arnoff (1957) Introduction to Operations Research. Wiley. New York, and
J. Morley English (1964) "Understanding the Engineering Design Process." The Journal of Industrial Engineering, Nov-Dec. 1964 Vol 15 (6). p. 291-296
“Yet while they exist, regardless of how long, each system has a specific structure made up of certain maintained relationships among its parts, and manifests irreducible characteristics of its own.”
Variant: Each system has a specific structure made up of certain maintained relationships among its parts, and manifests irreducible characteristics of its own.
Source: Introduction to Systems Philosophy (1972), p. 12.
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Ervin László 46
Hungarian musician and philosopher 1932Related quotes

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

Source: Economic Heresies (1971), Chapter III, Interest and Profits, p. 50 (confer Karl Marx, Das Kapital, Buch II, Chapter XX, p. 474)

Cause, Principle, and Unity (1584)
Source: The Life of Poetry (1949), p. 96
Context: Belief has its structures, and its symbols change. Its tradition changes. All the relationships within these forms are inter-dependent. We look at the symbols, we hope to read them, we hope for sharing and communication. Sometimes it is there at once, we find it before the words arrive, as in the gesture of John Brown, or the communication of a great actor-dancer, whose gesture and attitude will tell us before his speech adds meaning from another source. Sometimes it rises in us sleeping, evoked by the images of dream, recognized in the blood. The buried voices carry a ground music; they have indeed lived the life of our people. In times of perversity and stress and sundering, it may be a life inverted, the poet who leaps from the ship into the sea; on the level of open belief, it will be the life of the tribe. In subjugated peoples, the poet emerges as prophet.

1860s, Fourth of July Address to Congress (1861)
Context: And this issue embraces more than the fate of these United States. It presents to the whole family of man the question whether a constitutional republic, or democracy — a government of the people by the same people — can or can not maintain its territorial integrity against its own domestic foes. It presents the question whether discontented individuals, too few in numbers to control administration according to organic law in any case, can always, upon the pretenses made in this case, or on any other pretenses, or arbitrarily without any pretense, break up their government, and thus practically put an end to free government upon the earth. It forces us to ask, Is there in all republics this inherent and fatal weakness? Must a government of necessity be too strong for the liberties of its own people, or too weak to maintain its own existence?