Il y a aussi deux sortes de vérités, celles de Raisonnement et celle de Fait. Les vérités de Raisonnement sont nécessaires et leur opposé est impossible, et celles de Fait sont contingentes et leur opposé est possible.
La monadologie (33).
The Monadology (1714)
“It is not necessary to retain facts that we may reason concerning them.”
Il n'est pas nécessaire de tenir les choses pour en raisonner.
Act V, scene iv. Reported in Hoyt's New Cyclopedia Of Practical Quotations (1922), p. 658-59.
Le Barbier de Séville (1773)
Original
Il n'est pas nécessaire de tenir les choses pour en raisonner.
Le Barbier de Séville (1773)
Help us to complete the source, original and additional information
Pierre Beaumarchais 11
French playwright diplomat and polymath 1732–1799Related quotes
1840s, Essays: First Series (1841), History
Source: Commentary on the Metaphysics (c. 1270–1272), 1, 3; quoted in Josef Pieper, Leisure, the Basis of Culture (New York, 1952), p. 88
Z Magazine, May 1991 http://www.zmag.org/chomsky/articles/z9105-what-we-say.html.
Quotes 1990s, 1990-1994
[The structure of the cloud of comets surrounding the Solar System and a hypothesis concerning its origin, Bulletin of the Astronomical Institutes of the Netherlands, 11, 408, 91–110, 3 January 1950, 91, https://openaccess.leidenuniv.nl/bitstream/handle/1887/6036/BAN_11_91_110.pdf?sequence=1] (quote from p. 91)
Ramblings In Cheapside (1890)
Context: All we know is, that even the humblest dead may live along after all trace of the body has disappeared; we see them doing it in the bodies and memories of these that come after them; and not a few live so much longer and more effectually than is desirable, that it has been necessary to get rid of them by Act of Parliament. It is love that alone gives life, and the truest life is that which we live not in ourselves but vicariously in others, and with which we have no concern. Our concern is so to order ourselves that we may be of the number of them that enter into life — although we know it not.
in reference to Marx and Comte, p. 298
"From Enlightenment to Revolution" (1975)
As quoted in American Railway Engineering Association : Proceedings of the Annual Convention, Volume 51 (1950), p. 815; also quoted in Forbes Book of Quotations: 10,000 Thoughts on the Business of Life (2016), edited by Ted Goodman