“[The Ottoman Empire] whose sick body was not supported by a mild and regular diet, but by a powerful treatment, which continually exhausted it.”
No. 19. (Usbek writing to Rustan)
Lettres Persanes (Persian Letters, 1721)
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Montesquieu 34
French social commentator and political thinker 1689–1755Related quotes

“For if vicious propensity is, as it were, a disease of the soul like bodily sickness, even as we account the sick in body by no means deserving of hate, but rather of pity, so, and much more, should they be pitied whose minds are assailed by wickedness, which is more frightful than any sickness.”
Nam si uti corporum languor ita vitiositas quidam est quasi morbus animorum, cum aegros corpore minime dignos odio sed potius miseratione iudicemus, multo magis non insequendi sed miserandi sunt quorum mentes omni languore atrocior urguet improbitas.
Prose IV; line 42; translation by H. R. James
Alternate translation:
For as faintness is a disease of the body, so is vice a sickness of the mind. Wherefore, since we judge those that have corporal infirmities to be rather worthy of compassion than of hatred, much more are they to be pitied, and not abhorred, whose minds are oppressed with wickedness, the greatest malady that may be.
The Consolation of Philosophy · De Consolatione Philosophiae, Book IV

Salisbury to Disraeli (September 1876), from G. Cecil, The Life of Robert, Marquis of Salisbury. Volume II, p. 85
1870s

Speech to the Classical Association (8 January 1926), quoted in On England, and Other Addresses (1926), p. 105.
1926
Context: A character founded on pietas and gravitas had its roots in truth, and I am proud to think that the English word has been held in no less honour than the Roman... It is from Ammian, who wrote while the legions were leaving Britain, that we learn that the Roman word could no longer be trusted. That is to me a far more significant portent than the aggregation of the population in cities, the immense luxury, and the exhaustion of the permanent sources of wealth, all of which combined to sap that very character whose continued existence was necessary for the life of the State.

“Diet and Diabetes: The Meat of the Matter,” in EarthSave Magazine (November 2002), p. 22; as quoted in Will Tuttle, The World Peace Diet (Lantern Books, 2005), p. 85 https://books.google.it/books?id=BTqLjAOwsSMC&pg=PA85.

Ce corps qui s'appelait et qui s'appelle encore le saint empire romain n'était en aucune manière ni saint, ni romain, ni empire.
Essai sur l'histoire générale et sur les mœurs et l'esprit des nations, Chapter 70 (1756)
Citas

Quoted in "The Evil 100" – Page 35 – by Martin Gilman Wolcott – Social Science - 2004.