“Such things had occasionally been said by some political enthusiast in the olden time, but, for the first time in the history of the world, the representatives of a nation, the representatives of a real, living, breathing, hoping people, declared that all men are created equal. With one blow, with one stroke of the pen, they struck down all the cruel, heartless barriers that aristocracy, that priestcraft, that king-craft had raised between man and man. They struck down with one immortal blow that infamous spirit of caste that makes a God almost a beast, and a beast almost a god. With one word, with one blow, they wiped away and utterly destroyed, all that had been done by centuries of war — centuries of hypocrisy — centuries of injustice.”

Commentary on the tale of The Forty-Seven Samurai (or the "Forty-seven Ronin", or Akō Rōshi, the Akō "vendetta"), emphasizing his view that Bushido demands prompt action, and not delay, or concern about success and failure. Variant: "What if, nine months after Asano's death, Kira had died of an illness?"
Hagakure (c. 1716)

Sixth Lincoln-Douglas debate https://cwcrossroads.wordpress.com/2011/01/18/race-and-slavery-north-and-south-some-logical-fallacies/#comment-47553, (13 October 1860), Quincy, Illinois
1860s
Context: You know that in his Charleston speech, an extract from which he has read, he declared that the negro belongs to an inferior race; is physically inferior to the white man, and should always be kept in an inferior position. I will now read to you what he said at Chicago on that point. In concluding his speech at that place, he remarked, 'My friends, I have detained you about as long as I desire to do, and I have only to say let us discard all this quibbling about this man and the other man-this race and that race, and the other race being inferior, and therefore they must be placed in an inferior position, discarding our standard that we have left us. Let us discard all these things, and unite as one people throughout this land until we shall once more stand up declaring that all men are created equal'. Thus you see, that when addressing the Chicago Abolitionists he declared that all distinctions of race must be discarded and blotted out, because the negro stood on an equal footing with the white man; that if one man said the Declaration of Independence did not mean a negro when it declared all men created equal, that another man would say that it did not mean another man; and hence we ought to discard all difference between the negro race and all other races, and declare them all created equal.

15 February 2006, House of Commons, Prime Minister's Questions when he deputised for David Cameron in his absence. However, Tony Blair was answering questions and was the active leader of the Labour party. Hague was suggesting that Gordon Brown was the "true" power behind the party.

Attributed at a few sites to a debate in Peoria, Illinois with Stephen Douglas on 16 October 1858. No historical record of such a debate actually exists, though there was a famous set of speeches by both in Peoria on 16 October 1854, but transcripts of Lincoln's speech http://www.hti.umich.edu/cgi/t/text/text-idx?c=lincoln;cc=lincoln;type=simple;rgn=div1;q1=cleaver;view=text;subview=detail;sort=occur;idno=lincoln2;node=lincoln2%3A282 on that date do not indicate that he made such a statement. It in fact comes from a speech made by Douglas in the third debate http://www.hti.umich.edu/cgi/t/text/text-idx?c=lincoln;cc=lincoln;type=simple;rgn=div1;q1=fejee;view=text;subview=detail;sort=occur;idno=lincoln3;node=lincoln3%3A17 against Lincoln at Jonesboro, Illinois on 15 September 1858.
Misattributed

Source: The Fountains of Paradise (1979), Chapter 43 “Fail-Safe” (p. 223)

The day Francisco Franco, the dictator, died. Frases que reflejan el recorrido de Manuel Fraga, 16th January 2012, Gara, 16th January 2012, castellà http://www.gara.net/azkenak/01/315809/es/Frases-que-reflejan-recorrido-Manuel-Fraga,
Franco and Francoism

"A Reply to Kenneth Tynan: The Playwright's Role" in The Observer (29 June 1958)
Context: I believe that what separates us all from one another is simply society itself, or, if you like, politics. This is what raises barriers between men, this is what creates misunderstanding.
If I may be allowed to express myself paradoxically, I should say that the truest society, the authentic human community, is extra-social — a wider, deeper society, that which is revealed by our common anxieties, our desires, our secret nostalgias. The whole history of the world has been governed by nostalgias and anxieties, which political action does no more than reflect and interpret, very imperfectly. No society has been able to abolish human sadness, no political system can deliver us from the pain of living, from our fear of death, our thirst for the absolute. It is the human condition that directs the social condition, not vice versa.

Radio and television report to the American people on civil rights (11 June 1963)]
1963, Civil Rights Address

Glimpses of World History (1949)