"What vast additions to the conveniences and comforts of living might mankind have acquired, if the money spent in wars had been employed in works of public utility; what an extension of agriculture even to the tops of our mountains; what rivers rendered navigable, or joined by canals; what bridges, aqueducts, new roads, and other public works, edifices, and improvements ... might not have been obtained by spending those millions in doing good, which in the last war have been spent in doing mischief."
"Most people dislike vanity in others, whatever share they have of it themselves; but I give it fair quarter, wherever I meet with it, being persuaded that it is often productive of good to the possessor, and to others who are within his sphere of action: and therefore, in many cases, it would not be altogether absurd if a man were to thank God for his vanity among the other comforts of life."
"Those who govern, having much business on their hands, do not generally like to take the trouble of considering and carrying into execution new projects. The best public measures are therefore seldom adopted from previous wisdom, but forced by the occasion."
"Furnished as all Europe now is with Academies of Science, with nice instruments and the spirit of experiment, the progress of human knowledge will be rapid and discoveries made of which we have at present no conception. I begin to be almost sorry I was born so soon, since I cannot have the happiness of knowing what will be known a hundred years hence."