“Perhaps in the long view, de Gaulle was more responsible with his troublesome interventions into our domestic politics, for unifying our country than we will ever give him credit for.”

Dedication for the exhibit "After September 11 : Images from Ground Zero." (31 December 2001) http://italy.usembassy.gov/policy/events/020311/

Review of Things I Didn't Know by Robert Hughes (New York Review of Books, January 11, 2007)
Essays and reviews

Teachings of the Prophet Joseph Smith, 257 (11 April 1842)
1840s

[2005-07-26, Why I vetoed the contraception bill, Boston Globe]
2003–2007 Governor of Massachusetts

America and Americans (1966)

Remarks by President Obama at Naturalization Ceremony for Servicemembers at The War Memorial of Korea in Seoul, Republic of Korea at April 25, 2014 http://www.whitehouse.gov/the-press-office/2014/04/25/remarks-president-obama-naturalization-ceremony-servicemembers
2014
Context: What makes us Americans is something more than just the circumstances of birth, what we look like, what God we worship, but rather it is a joyful spirit of citizenship. Citizenship demands participation and responsibility, and service to our country and to one another. And few embody that more than our men and women in uniform.

Presidency (1977–1981), Farewell Address (1981)

Source: Pale Blue Dot: A Vision of the Human Future in Space (1994), p. 8, Supplemental image at randi.org http://www.randi.org/images/122801-BlueDot.jpg
Context: Consider again that dot. That's here. That's home. That's us. On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives. The aggregate of our joy and suffering, thousands of confident religions, ideologies, and economic doctrines, every hunter and forager, every hero and coward, every creator and destroyer of civilization, every king and peasant, every young couple in love, every mother and father, hopeful child, inventor and explorer, every teacher of morals, every corrupt politician, every "superstar", every "supreme leader", every saint and sinner in the history of our species lived there — on a mote of dust suspended in a sunbeam.
The Earth is a very small stage in a vast cosmic arena. Think of the rivers of blood spilled by all those generals and emperors so that, in glory and triumph, they could become the momentary masters of a fraction of a dot. Think of the endless cruelties visited by the inhabitants of one corner of this pixel on the scarcely distinguishable inhabitants of some other corner, how frequent their misunderstandings, how eager they are to kill one another, how fervent their hatreds.
Our posturings, our imagined self-importance, the delusion that we have some privileged position in the Universe, are challenged by this point of pale light. Our planet is a lonely speck in the great enveloping cosmic dark. In our obscurity, in all this vastness, there is no hint that help will come from elsewhere to save us from ourselves.
The Earth is the only world known so far to harbor life. There is nowhere else, at least in the near future, to which our species could migrate. Visit, yes. Settle, not yet. Like it or not, for the moment the Earth is where we make our stand.
It has been said that astronomy is a humbling and character-building experience. There is perhaps no better demonstration of the folly of human conceits than this distant image of our tiny world. To me, it underscores our responsibility to deal more kindly with one another, and to preserve and cherish the pale blue dot, the only home we've ever known.

In "Crimes against nature" in Rolling Stone magazine (11 December 2003).