“We must dare to be great; and we must realize that greatness is the fruit of toil and sacrifice and high courage”

Also used at his funeral (3 Sep. 2009) invitation. Quoted in "Dead stars and classic art will surround Michael Jackson " in CNN.com/entertainment (03 July 2009) http://edition.cnn.com/2009/SHOWBIZ/Music/09/03/michael.jackson.funeral/index.html#cnnSTCOther1

Source: Letters and Papers from Prison (1967; 1997), Civil Courage, p. 5.
Context: What lies behind the complaint about the dearth of civil courage? In recent years we have seen a great deal of bravery and self-sacrifice, but civil courage hardly anywhere, even among ourselves. To attribute this simply to personal cowardice would be too facile a psychology; its background is quite different. In a long history, we Germans have had to learn the need for and the strength of obedience. In the subordination of all personal wishes and ideas to the tasks to which we have been called, we have seen the meaning and greatness of our lives. We have looked upwards, not in servile fear, but in free trust, seeing in our tasks a call, and in our call a vocation. This readiness to follow a command from "above" rather than our own private opinions and wishes was a sign of legitimate self-distrust. Who would deny that in obedience, in their task and calling, the Germans have again and again shown the utmost bravery and self-sacrifice? But the German has kept his freedom — and what nation has talked more passionately of freedom than the Germans, from Luther to the idealist philosophers? — by seeking deliverance from self-will through service to the community. Calling and freedom were to him two sides of the same thing. But in this he misjudged the world; he did not realize that his submissiveness and self-sacrifice could be exploited for evil ends. When that happened, the exercise of the calling itself became questionable, and all the moral principles of the German were bound to totter. The fact could not be escaped that the Germans still lacked something fundamental: he could not see the need for free and responsible action, even in opposition to the task and his calling; in its place there appeared on the one hand an irresponsible lack of scruple, and on the other a self-tormenting punctiliousness that never led to action. Civil courage, in fact, can grow only out of the free responsibility of free men. Only now are the Germans beginning to discover the meaning of free responsibility. It depends on a God who demands responsible action in a bold venture of faith, and who promises forgiveness and consolation to the man who becomes a sinner in that venture.

Letter to Dorothy Miller February 5, 1952; as quoted in Abstract Expressionism Creators and Critics, edited by Clifford Ross, Abrams Publishers New York 1990, p. 193
1950s

Fireside Chat on National Security, Washington, D.C. (29 December 1940)
1940s

Source: 21 June 2020 tweet https://twitter.com/elonmusk/status/1274614961151414273 and TechFilter https://techstartups.com/2020/06/21/elon-musk-we-must-pass-the-great-filter-social-media-is-a-limbic-amplifier-which-inherently-destabilizes-civilization

Source: The Awakening and Selected Stories

1950s, Second Inaugural Address (1957)
Context: We look upon this shaken Earth, and we declare our firm and fixed purpose — the building of a peace with justice in a world where moral law prevails. The building of such a peace is a bold and solemn purpose. To proclaim it is easy. To serve it will be hard. And to attain it, we must be aware of its full meaning — and ready to pay its full price. We know clearly what we seek, and why. We seek peace, knowing that peace is the climate of freedom. And now, as in no other age, we seek it because we have been warned, by the power of modern weapons, that peace may be the only climate possible for human life itself. Yet this peace we seek cannot be born of fear alone: it must be rooted in the lives of nations. There must be justice, sensed and shared by all peoples, for, without justice the world can know only a tense and unstable truce. There must be law, steadily invoked and respected by all nations, for without law, the world promises only such meager justice as the pity of the strong upon the weak. But the law of which we speak, comprehending the values of freedom, affirms the equality of all nations, great and small. Splendid as can be the blessings of such a peace, high will be its cost: in toil patiently sustained, in help honorably given, in sacrifice calmly borne.

1980s, First term of office (1981–1985), First Inaugural address (1981)
Context: Above all, we must realize that no arsenal or no weapon in the arsenals of the world is so formidable as the will and moral courage of free men and women. It is a weapon our adversaries in today's world do not have. It is a weapon that we as Americans do have. Let that be understood by those who practice terrorism and prey upon their neighbors.