“When a change occurs in Nature, the quantity of action necessary for that change is as small as possible.”
Les Loix du Mouvement et du Repos, déduites d'un Principe Métaphysique (1746)
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Pierre Louis Maupertuis 24
French mathematician, philosopher and man of letters 1698–1759Related quotes

Preface (1982 edition), p. ix
Capitalism and Freedom (1962)
Context: There is enormous inertia—a tyranny of the status quo—in private and especially governmental arrangements. Only a crisis—actual or perceived—produces real change. When that crisis occurs, the actions that are taken depend on the ideas that are lying around. That, I believe, is our basic function: to develop alternatives to existing policies, to keep them alive and available until the politically impossible becomes politically inevitable.
Source: An Introduction to Cybernetics (1956), Part I: Mechanism, p. 9: Chapter 2 Change, lead paragraph.
Context: The most fundamental concept in cybernetics is that of "difference", either that two things are recognisably different or that one thing has changed with time. Its range of application need not be described now, for the subsequent chapters will illustrate the range abundantly. All the changes that may occur with time are naturally included, for when plants grow and planets age and machines move some change from one state to another is implicit. So our first task will be to develop this concept of "change", not only making it more precise but making it richer, converting it to a form that experience has shown to be necessary if significant developments are to be made.

“If it is not necessary to change, it is necessary not to change.”
Attributed to Benjamin Disraeli, to William Gerard Hamilton, to George Bernard Shaw, to John F. Kennedy (who at any rate quoted it) and to Edmund Burke, it was actually said by Lucius Cary, 2nd Viscount Falkland in a speech in the House of Commons on 1641-11-22
Misattributed

“If it is not necessary to change, it is necessary not to change.”
Attributed to Edmund Burke, to William Gerard Hamilton, to George Bernard Shaw, to John F. Kennedy (who quoted it) and to Benjamin Disraeli, it was actually said by Lucius Cary, 2nd Viscount Falkland in a speech in the House of Commons on 1641-11-22.
Misattributed
Chris Argyris (1982) as cited in: "Chris Argyris: The Manager's Academic" in Business (2003). p. 965

Histoire de l'Academie (1744) p. 423; Les Oeuvres De Mr. De Maupertuis (1752) vol. iv p. 17; as quoted by Philip Edward Bertrand Jourdain, The Principle of Least Action https://books.google.com/books?id=y3UVAQAAIAAJ (1913) p. 5.