“We have known divisions, which must be healed to move forward in great purposes — and I will strive in good faith to heal them. Yet those divisions do not define America. We felt the unity and fellowship of our nation when freedom came under attack, and our response came like a single hand over a single heart. And we can feel that same unity and pride whenever America acts for good, and the victims of disaster are given hope, and the unjust encounter justice, and the captives are set free.”

2010s, 2017, January, Inaugural address, (January 20, 2017)

Thomas Jefferson, letter to John Dickinson (23 July 1801), 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. 9 http://files.libertyfund.org/files/757/0054-09_Bk.pdf, pp. 280-282.
1800s, First Presidential Administration (1801–1805)
Context: I am sorry the person recommended has not been agreeable to all the republicans, but I am more concerned to see in this disapprobation a germ of division which, if not smothered, will continue you under that rule from which union is relieving our fellow citizens in other states. It is disheartening to see, on the approaching crisis of election, a division of that description of Republicans, which has certainly no strength to spare. But, my dear friend, if we do not learn to sacrifice small differences of opinion, we can never act together. Every man cannot have his way in all things. If his own opinion prevails at some times, he should acquiesce on seeing that of others preponderate at others. Without this mutual disposition we are disjointed individuals, but not a society. My position is painful enough between federalists who cry out on the first touch of their monopoly, and republicans who clamor for universal removal. A subdivision of the latter will increase the perplexity. I am proceeding with deliberation and inquiry to do what I think just to both descriptions and conciliatory to both. The greatest good we can do our country is to heal it’s party divisions & make them one people. I do not speak of their leaders who are incurable, but of the honest and well-intentioned body of the people. I consider the pure federalist as a republican who would prefer a somewhat stronger executive; and the republican as one more willing to trust the legislature as a broader representation of the people, and a safer deposit of power for many reasons. But both sects are republican, entitled to the confidence of their fellow citizens. Not so their quondam leaders, covering under the mask of federalism hearts devoted to monarchy. The Hamiltonians, the Essex-men http://www.monticello.org/mulberry-row/people/essex, the revolutionary tories &c. They have a right to tolerance, but neither to confidence nor power. It is very important that the pure federalist and republican should see in the opinion of each other but a shade of his own, which by a union of action will be lessened by one-half: that they should see & fear the monarchist as their common enemy, on whom they should keep their eyes, but keep off their hands.

1940s, State of the Union Address — The Four Freedoms (1941)

Special Message to the Congress on the Threat to the Freedom of Europe (1948)

2021, January, Presidential Inaugural Address (2021)

Adam Bede (1859)

First Message to the U.S. Department of Defense
Context: It’s good to be back and I’m grateful to serve alongside you as Secretary of Defense. Together with the Intelligence Community we are the sentinels and guardians of our nation. We need only look to you, the uniformed and civilian members of the Department and your families, to see the fundamental unity of our country. You represent an America committed to the common good; an America that is never complacent about defending its freedoms; and an America that remains a steady beacon of hope for all mankind. Every action we take will be designed to ensure our military is ready to fight today and in the future. Recognizing that no nation is secure without friends, we will work with the State Department to strengthen our alliances. Further, we are devoted to gaining full value from every taxpayer dollar spent on defense, thereby earning the trust of Congress and the American people. I am confident you will do your part. I pledge to you I’ll do my best as your Secretary. MATTIS SENDS

2000s, 2006, State of the Union (January 2006)

A Thanksgiving Message from President-Elect Donald J. Trump https://www.youtube.com/watch?v=BUnv6Kb7syQ (23 November 2016)
2010s, 2016, November