“In addition to promoting awareness of nonviolence, it’s just possible – indeed it is absolutely critical – that we work with undaunted determination to create a sane firearms policy that makes it harder for disturbed individuals to secure weapons of mass murder. We can no longer afford to shirk this urgent responsibility.”

1960s, The Quest for Peace and Justice (1964)
Context: Nonviolence is a powerful and just weapon. Indeed, it is a weapon unique in history, which cuts without wounding and ennobles the man who wields it.
I believe in this method because I think it is the only way to reestablish a broken community. It is the method which seeks to implement the just law by appealing to the conscience of the great decent majority who through blindness, fear, pride, and irrationality have allowed their consciences to sleep.

Truman Library address (2006)
Context: No nation can make itself secure by seeking supremacy over all others. We all share responsibility for each other’s security, and only by working to make each other secure can we hope to achieve lasting security for ourselves.
— And, I would add that this responsibility is not simply a matter of States being ready to come to each other’s aid when attacked — important though that is. It also includes our shared responsibility to protect populations from genocide, war crimes, ethnic cleansing and crimes against humanity — a responsibility solemnly accepted by all nations at last year’s UN world summit. That means that respect for national sovereignty can no longer be used as a shield by Governments intent on massacring their own people, or as an excuse for the rest of us to do nothing when heinous crimes are committed.

"A Call for Prayer – and Action -- Against Violence in America" (2012)
Context: What, we wonder, can be done to prevent such unpredictable outbreaks of violence? No, we can’t always pinpoint when a specific individual will erupt in a spree of deadly violence. But it is just possible that we can begin to create a less violent society, a society in which nonviolent conflict reconciliation is a more widely-held value, a society in which individuals with serious mental health problems are more likely to be identified and more likely to receive needed treatment and care.

In 'Beauty Is the Mystery of Life', 1989; a lecture by Agnes Martin, Carnegie Museum of Art, Pittsburgh, 1989. Printed in Agnes Martin, eds. Morris and Bell, pp. 158–59
1980 - 2000

Source: A talk at Slush 2015 https://www.youtube.com/watch?v=AV9gnLKw8P0 November 2015

"The Man with the Mustache"

As quoted by Charles W. Misner, Kip S. Thorne, and Wojciech H. Zurek. "John Wheeler, relativity, and quantum information." https://authors.library.caltech.edu/15184/1/Misner2009p1638Phys_Today.pdf Physics Today 62, no. 4 (April 2009): 40–46 (quote from p. 44) [10.1063/1.3120895]

“Fascismo and the Rights of Victory” speech delivered at Florence (9 October 1919) p. 106
1920s, Mussolini as Revealed in his Political Speeches (November 1914—August 1923) (1923)

Saving Ourselves From Self-Destruction (2004)
Context: We must abandon the unworkable notion that it is morally reprehensible for some countries to pursue weapons of mass destruction yet morally acceptable for others to rely on them for security — and indeed to continue to refine their capacities and postulate plans for their use.
Similarly, we must abandon the traditional approach of defining security in terms of boundaries — city walls, border patrols, racial and religious groupings. The global community has become irreversibly interdependent, with the constant movement of people, ideas, goods and resources. In such a world, we must combat terrorism with an infectious security culture that crosses borders — an inclusive approach to security based on solidarity and the value of human life. In such a world, weapons of mass destruction have no place.