Source: How To Write A Sentence And How To Read One (2011), Chapter 3, It's Not The Thought That Counts, p. 26
“Which leads us to a conclusion that may at first appear paradoxical, namely, that it is production which opens a demand for products.”
Source: A Treatise On Political Economy (Fourth Edition) (1832), Book I, On Production, Chapter XV, p. 133 (See also: Say's Law)
Context: A man who applies his labour to the investing of objects with value by the creation of utility of some sort, can not expect such a value to be appreciated and paid for, unless where other men have the means of purchasing it. Now, of what do these means consist? Of other values of other products, likewise the fruits of industry, capital, and land. Which leads us to a conclusion that may at first appear paradoxical, namely, that it is production which opens a demand for products.
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Jean-Baptiste Say 72
French economist and businessman 1767–1832Related quotes

Source: Theory of Economic Dynamics (1965), Chapter 4, Profits and Investments, p. 55

Source: 1930s-1950s, "The Nature of the Firm" (1937), p. 394-5
Variant: Product quality can then be defined as: The composite product characteristics of engineering and manufacturing that determine the degree to which the product, in use, will meet the expectations of the customer.
Source: Total Quality Control, 1983, p. 7

Source: You Learn by Living (1960), p. 95

Source: The Production of Security (1849), p. 31

Misattributed
Original: (fr) Quand je suis le plus faible, je vous demande la liberté parce que tel est votre principe ; mais quand je suis le plus fort, je vous l’ôte, parce que tel est le mien
(fr) Also appears in the form "Quand les libéraux sont au pouvoir, nous leur demandons la liberté, parce que c’est leur principe, et, quand nous sommes au pouvoir, nous la leur refusons, parce que c’est le nôtre"
Misattributed to Veuillot in Dune (1965) by Frank Herbert: "When I am weaker than you, I ask you for freedom because that is according to your principles; when I am stronger than you, I take away your freedom because that is according to my principles."
According to Pierre Pierrard, this was attributed to Veuillot by Montalambert, and Veuillot protested he did not say it.