“We meet in an hour of grief and challenge. Dag Hammarskjold is dead. But the United Nations lives. His tragedy is deep in our hearts, but the task for which he died is at the top of our agenda. A noble servant of peace is gone. But the quest for peace lies before us.”

1970s, Second Inaugural Address (1973)

Sharon pays homage to Mahatma Gandhi, 9 September 2003, http://www.rediff.com/news/2003/sep/09sharon2.htm
2000s

The Thirteenth Revelation, Chapter 39
Context: Our courteous Lord willeth not that His servants despair, for often nor for grievous falling: for our falling hindereth not Him to love us. Peace and love are ever in us, being and working; but we be not alway in peace and in love. But He willeth that we take heed thus that He is Ground of all our whole life in love; and furthermore that He is our everlasting Keeper and mightily defendeth us against our enemies, that be full fell and fierce upon us; — and so much our need is the more for we give them occasion by our falling.

Address before the Indian Council of World Affairs, New Delhi, India, April 5, 1956, as quoted in Walter P Reuther: Selected Papers (1961), by Henry M. Christman, p. 141
1950s, Address before the Indian Council on World Affairs (1956)

1870s, Letter to war veterans (1875)

2014, Address to European Youth (March 2014)
Context: In the end, the success of our ideals comes down to us -- including the example of our own lives, our own societies. We know that there will always be intolerance. But instead of fearing the immigrant, we can welcome him. We can insist on policies that benefit the many, not just the few; that an age of globalization and dizzying change opens the door of opportunity to the marginalized, and not just a privileged few. Instead of targeting our gay and lesbian brothers and sisters, we can use our laws to protect their rights. Instead of defining ourselves in opposition to others, we can affirm the aspirations that we hold in common. That’s what will make America strong. That’s what will make Europe strong. That’s what makes us who we are. And just as we meet our responsibilities as individuals, we must be prepared to meet them as nations. Because we live in a world in which our ideals are going to be challenged again and again by forces that would drag us back into conflict or corruption. We can’t count on others to rise to meet those tests.

Nobel Peace Prize Acceptance Speech (2012)
Context: The peace of our world is indivisible. As long as negative forces are getting the better of positive forces anywhere, we are all at risk. It may be questioned whether all negative forces could ever be removed. The simple answer is: “No!” It is in human nature to contain both the positive and the negative. However, it is also within human capability to work to reinforce the positive and to minimize or neutralize the negative. Absolute peace in our world is an unattainable goal. But it is one towards which we must continue to journey, our eyes fixed on it as a traveller in a desert fixes his eyes on the one guiding star that will lead him to salvation. Even if we do not achieve perfect peace on earth, because perfect peace is not of this earth, common endeavours to gain peace will unite individuals and nations in trust and friendship and help to make our human community safer and kinder.

2000s, 2003, Invasion of Iraq (March 2003)

Interview with Monte Leach, Peace is possible, peace is inevitable, Share International (July 2003) http://www.share-international.org/magazine/old_issues/2003/july_03.htm#voice.