“I wish to salute the intransigent patriotism and the unflinching determination for independence of the Roumanian president. I was allied to him by a true friendship.”

Original: La sostanziale differenza tra me ed un'amicizia, io credo nella vera amicizia.
Source: prevale.net

L'Ami du peuple, vol. 7, p. 3965

Source: 2000s, 2002, Worth the Fighting For (2002), p. 373

As quoted by David Ablin and Marlowe Hood (March 14, 1985), "The Lesser Evil: An Interview with Norodom Sihanouk" http://www.nybooks.com/articles/archives/1985/mar/14/the-lesser-evil-an-interview-with-norodom-sihanouk/?pagination=false, The New York Review of Books.
Interviews

Letter to Mordecai Manuel Noah (1819), as quoted in The Jews, Judea, and Christianity : A Discourse on the Restoration of the Jews (1849) by M. M. Noah, p. xi
1810s
Context: I really wish the Jews again in Judea, an independent nation, for, as I believe, the most enlightened men of it have participated in the amelioration of the philosophy of the age; once restored to an independent government, and no longer persecuted, they would soon wear away some of the asperities and peculiarities of their character, possibly in time become liberal Unitarian Christians, for your Jehovah is our Jehovah, and your God of Abraham, Isaac, and Jacob is our God.

First public examination (21 February 1431)
Trial records (1431)

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.

Source: Wintergirls