“Commerce tends to wear off those prejudices which maintain distinction and animosity between nations. It softens and polishes the manners of men. It unites them, by one of the strongest of all ties, the desire of supplying their mutual wants.”

Napoleon Bonaparte, Napoleon's War Maxims: With His Social and Political Thoughts (1804-15), Gale & Polden, (1899) p. 150

Riyadh-as-Saliheen by Imam Al-Nawawi, volume 3, hadith number 322
Sunni Hadith

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.

Letter to Thomas Jefferson, 28 June 1813. Often misquoted as "The general principles on which the fathers achieved independence were the general principles of Christianity"
1810s
Context: The general principles on which the fathers achieved independence, were … the general principles of Christianity, in which all those sects were united, and the general principles of English and American liberty, in which all those young men united, and which had united all parties in America, in majorities sufficient to assert and maintain her independence. Now I will avow, that I then believed and now believe that those general principles of Christianity are as eternal and immutable as the existence and attributes of God; and that those principles of liberty are as unalterable as human nature and our terrestrial, mundane system.

“Commerce and Culture,” p. 281.
Giants and Dwarfs (1990)

Source: Nature of Man and His Government (1959), p. 45

Thoughts on Various Subjects from Miscellanies (1711-1726)

Reply to New York Workingmen's Democratic Republican Association (21 March 1864), Collected Works, Vol. 7, p. 259-260 1:566 http://quod.lib.umich.edu/l/lincoln/lincoln7/1:566?rgn=div1;singlegenre=All;sort=occur;subview=detail;type=simple;view=fulltext;q1=houseless
1860s
Context: None are so deeply interested to resist the present rebellion as the working people. Let them beware of prejudice, working division and hostility among themselves. The most notable feature of a disturbance in your city last summer, was the hanging of some working people by other working people. It should never be so. The strongest bond of human sympathy, outside of the family relation, should be one uniting all working people, of all nations, and tongues, and kindreds. Nor should this lead to a war upon property, or the owners of property. Property is the fruit of labor — property is desirable — is a positive good in the world. That some should be rich, shows that others may become rich, and hence is just encouragement to industry and enterprise. Let not him who is houseless pull down the house of another; but let him labor diligently and build one for himself, thus by example assuring that his own shall be safe from violence when built.

Source: The Rum Diary