“We have to-day perhaps the most magnificent opportunity of service to our country that has ever been given to any party. You who have just been elected to the House of Commons are, by the testimony of your fellow-countrymen, their natural leaders for the next four or five years. It is your duty, your primary duty, to educate that great democracy of which we are all a part…Can there be anything that stands before us more clearly or poignantly than the groups of our fellow-countrymen who listened in faith to what we had to say, who trusted us and have given us their confidence, and who believe in their hearts that we have come to London to do what we can to right those things that are hard and difficult for them, and to help them in what is always the difficult struggle that they have in life? Don't ever lose touch with your constituency; don't ever mistake the voice of the clubman and the voice of the Pressman in London for the voice of the country. It is the country that has returned you; it is the country which will judge you.”

Inaugural address (March 4, 1841)

Encouraging his men to re-enlist in the army (31 December 1776)
1770s

2010s, 2015, Remarks at the SMU 100th Spring Commencement (May 2015)

Letter to British Prime Minister Ramsay MacDonald (25 February 1924), quoted in Anthony Adamthwaite, Grandeur and Misery: France's Bid for Power in Europe 1914-1940 (London: Arnold, 1995), p. 101.

1920s, The Genius of America (1924)

1961, Inaugural Address
Context: In your hands, my fellow citizens, more than in mine, will rest the final success or failure of our course. Since this country was founded, each generation of Americans has been summoned to give testimony to its national loyalty. The graves of young Americans who answered the call to service surround the globe.

2011, Address on interventions in Libya (March 2011)
Context: Much of the debate in Washington has put forward a false choice when it comes to Libya. On the one hand, some question why America should intervene at all — even in limited ways — in this distant land. They argue that there are many places in the world where innocent civilians face brutal violence at the hands of their government, and America should not be expected to police the world, particularly when we have so many pressing needs here at home.
It’s true that America cannot use our military wherever repression occurs. And given the costs and risks of intervention, we must always measure our interests against the need for action. But that cannot be an argument for never acting on behalf of what’s right. In this particular country — Libya — at this particular moment, we were faced with the prospect of violence on a horrific scale. We had a unique ability to stop that violence: an international mandate for action, a broad coalition prepared to join us, the support of Arab countries, and a plea for help from the Libyan people themselves. We also had the ability to stop Qaddafi’s forces in their tracks without putting American troops on the ground.
To brush aside America’s responsibility as a leader and — more profoundly — our responsibilities to our fellow human beings under such circumstances would have been a betrayal of who we are. Some nations may be able to turn a blind eye to atrocities in other countries. The United States of America is different. And as President, I refused to wait for the images of slaughter and mass graves before taking action.

2015, Speech: Declaration as Vice Presidential Candidate

Life Without Principle (1863)