“Cultivators of the earth are the most valuable citizens. They are the most vigorous, the most independent, the most virtuous, and they are tied to their country and wedded to its liberty and interests by the most lasting bands. As long therefore as they can find employment in this line, I would not convert them into mariners, artisans, or any thing else. But our citizens will find employment in this line till their numbers, and of course their productions, become too great for the demand both internal and foreign.”
Letter to John Jay (23 August 1785); published in The Papers of Thomas Jefferson (1953), edited by Julian P. Boyd, vol. 8, p. 426
1780s
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Thomas Jefferson 456
3rd President of the United States of America 1743–1826Related quotes

“I find that moral courage is the most valuable and most usually absent characteristic.”
In a letter to Beatrice (22 August 1943), published in The Patton Papers 1940-1945 (1996) edited by Martin Blumenson https://books.google.com/books?id=eV2pRL7arKkC&pg=PT239&dq=Moral+courage+is+the+most+valuable+and+usually+the+most+absent+characteristic+in+men.&hl=en&sa=X&ved=0ahUKEwjPrbHtvsXVAhXBRyYKHUz6CAw4ChDoAQhCMAU#v=onepage&q=Moral%20courage%20is%20the%20most%20valuable%20and%20usually%20the%20most%20absent%20characteristic%20in%20men.&f=false

Said to portrait painter Samuel Johnson Woolf, cited in Here am I (1941), Samuel Johnson Woolf; this has often been abbreviated: Most writers regard truth as their most valuable possession, and therefore are most economical in its use.
Context: A critic never made or killed a book or a play. The people themselves are the final judges. It is their opinion that counts. After all, the final test is truth. But the trouble is that most writers regard truth as their most valuable possession and therefore are most economical in its use.

The Romance of Commerce (1918), Concerning Commerce

“Find things beautiful as much as you can, most people find too little beautiful.”
1870s

Qu'on me donne six lignes écrites de la main du plus honnête homme, j'y trouverai de quoi le faire pendre.
As quoted in The Cyclopedia of Practical Quotations (1896) by Jehiel K̀eeler Hoyt, p. 763
Édouard Fournier, in L'Espirit dans l'Historie (1867), 3rd edition, Ch. 51, p. 260, disputes the traditional attribution, and suggests various agents of Richelieu might have been the actual author.
David Hackett Fischer, in Champlain's Dream (2009), Simon & Schuster, p. 704, n. 14, says it's a paraphrase of Quintilian and there is no source closer to Richelieu than Francoise Bertaut's Memoires pour servir à l'histoire d'Anne d'Autriche.
Disputed

“What most clearly characterizes true freedom and its true employment is its misemployment.”
L 49
Aphorisms (1765-1799), Notebook L (1793-1796)

Source: The Principles of Political Economy and Taxation (1821) (Third Edition), Chapter VII, On Foreign Trade, p. 81 (See also.. Karl Marx, Das Kapital,(Buch II), Chapter XX, p. 474)
Context: Under a system of perfectly free commerce, each country naturally devotes its capital and labour to such employments as are most beneficial to each. This pursuit of individual advantage is admirably connected with the universal good of the whole. By stimulating industry, by rewarding ingenuity, and by using most efficaciously the peculiar powers bestowed by nature, it distributes labour most effectively and most economically: while, by increasing the general mass of productions, it diffuses general benefit, and binds together, by one common tie of interest and intercourse, the universal society of nations throughout the civilized world.