“Moreover, the argument for national polity, for Christianity, and for Confucianism… are also insufficient to bolster people’s hearts. What, then, will? I say there is one thing: namely, to establish our goal and advance toward civilization… The way in which to preserve this independence cannot be sought anywhere except in civilization.”

Radio broadcast (October 1941)

Source: Woman, Church and State (1893), p. 539

Source: A Treatise On Political Economy (Fourth Edition) (1832), Introduction, p. xxix

Laissez faire, telle devrait être la devise de toute puissance publique, depuis que le monde est civilisé ... Détestable principe que celui de ne vouloir grandir que par l'abaissement de nos voisins! Il n'y a que la méchanceté et la malignité du coeur de satisfaites dans ce principe, et l’intérêt y est opposé. Laissez faire, morbleu! Laissez faire!!
Marc-René de Voyer de Paulmy d'Argenson. Diary of René de Voyer, (1736); As quoted in J.M. Keynes, 1926, "The End of Laissez Faire". Argenson's Mémoirs were published only in 1858, ed. Jannet, Tome V, p. 362. See A. Oncken (Die Maxime Laissez faire et laissez passer, ihr Ursprung, ihr Werden, 1866)
Alternative translation:
Laissez faire ought to be the motto of every public authority
Quoted in: Mark Skousen. The Making of Modern Economics, (2009), p. 48

The Autobiography of Will Rogers (1949)
Variant: You can't say that civilization don't advance, however, for in every war they kill you in a new way.

Source: Nemesis Games (2015), Chapter 30 (p. 316)

XXXIII, p. 99
Essay on the Generative Principle of Political Constitutions (1809)

Letter to http://memory.loc.gov/cgi-bin/query/r?ammem/mtj:@field(DOCID+@lit(tj110158)) Thomas Leiper (12 June 1815). Published in The Works of Thomas Jefferson in Twelve Volumes http://oll.libertyfund.org/ToC/0054.php, Federal Edition, Paul Leicester Ford, ed., New York: G. P. Putnam's Sons, 1904, Vol. 11 http://oll.libertyfund.org/Texts/Jefferson0136/Works/0054-11_Bk.pdf, pp. 477–478.
The sentence "I hope our wisdom will grow with our power, and teach us, that the less we use our power, the greater it will be." was used by US-President Barack Obama in his A New Beginning Speech.
1810s
Context: We concur in considering the government of England as totally without morality, insolent beyond bearing, inflated with vanity and ambition, aiming at the exclusive dominion of the sea, lost in corruption, of deep-rooted hatred towards us, hostile to liberty wherever it endeavors to show its head, and the eternal disturber of the peace of the world. In our estimate of Bonaparte, I suspect we differ. [... ] Our form of government is odious to him, as a standing contrast between republican and despotic rule; and as much from that hatred, as from ignorance in political economy, he had excluded intercourse between us and his people, by prohibiting the only articles they wanted from us, that is, cotton and tobacco. Whether the war we have had with England, and the achievements of that war, and the hope that we may become his instruments and partisans against that enemy, may induce him, in future, to tolerate our commercial intercourse with his people, is still to be seen. For my part, I wish that all nations may recover and retain their independence; that those which are overgrown may not advance beyond safe measures of power, that a salutary balance may be ever maintained among nations, and that our peace, commerce, and friendship, may be sought and cultivated by all. It is our business to manufacture for ourselves whatever we can, to keep our markets open for what we can spare or want; and the less we have to do with the amities or enmities of Europe, the better. Not in our day, but at no distant one, we may shake a rod over the heads of all, which may make the stoutest of them tremble. But I hope our wisdom will grow with our power, and teach us, that the less we use our power, the greater it will be.

Out of the Jungle (1967); as quoted in Victoria Moran, Compassion, the Ultimate Ethic: An Exploration of Veganism (Wellingborough: Thorsons, 1985), p. 32.