“To hinder, besides, the farmer from selling his goods at all times to the best market, is evidently to sacrifice the ordinary laws of justice to an idea of public utility, to a sort of reasons of state; an act of legislative authority which ought to be exercised only, which can be pardoned only in cases of the most urgent necessity.”
Source: (1776), Book IV, Chapter V, p. 584.
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Adam Smith 175
Scottish moral philosopher and political economist 1723–1790Related quotes

Sharp v. Wakefield (1891), 64 L. T. Rep. 180 [1891], Ap. Ca. 173.

Der kategorische Imperativ, der überhaupt nur aussagt, was Verbindlichkeit sei, ist: handle nach einer Maxime, welche zugleich als ein allgemeines Gesetz gelten kann.
Source: Metaphysics of Morals (1797), Ch. 11

The Rights of the Colonists (1772)

From Does Price Fixing Destroy Liberty? (1920) by George H. Earle, Jr.

Letter to Danbury Baptist Association, CT. (1 January 1802) This statement is the origin of the often used phrase "separation of Church and State".
1800s, First Presidential Administration (1801–1805)

Attributed by [Will, Hutton, http://www.guardian.co.uk/commentisfree/2008/nov/02/economics-economy-john-keynes, Will the real Keynes stand up, not this sad caricature?, Guardian, November 2, 2008, 2009-02-05]
Actual quote: "the Stock Exchange revalues many investments every day and the revaluations give a frequent opportunity to the individual (though not to the community as a whole) to revise his commitments. It is as though a farmer, having tapped his barometer after breakfast, could decide to remove his capital from the farming business between 10 and 11 in the morning and reconsider whether he should return to it later in the week."
The General Theory of Employment, Interest and Money (1935), Ch. 12 http://www.marxists.org/reference/subject/economics/keynes/general-theory/ch12.htm
Attributed