“When Bonaparte was to be dethroned, the Sovereigns of Europe called up their people to their aid; they invoked them in the sacred names of Freedom and National Independence; the cry went forth throughout Europe: and those, whom Subsidies had no power to buy, and Conscriptions no force to compel, roused by the magic sound of Constitutional Rights, started spontaneously into arms. The long-suffering Nations of Europe rose up as one man, and by an effort tremendous and wide spreading, like a great convulsion of nature, they hurled the conqueror from his throne. But promises made in days of distress, were forgotten in the hour of triumph…The rulers of mankind…had set free a gigantic spirit from its iron prison, but when that spirit had done their bidding, they shrunk back with alarm, from the vastness of that power, which they themselves had set into action, and modestly requested, it would go down again into its former dungeon. Hence, that gloomy discontent, that restless disquiet, that murmuring sullenness, which pervaded Europe after the overthrow of Bonaparte; and which were so unlike that joyful gladness, which might have been looked for, among men, who had just been released from the galling yoke of a foreign and a military tyrant. In 1820 the long brooding fire burst out into open flame; in Germany it was still kept down and smothered, but in Italy, in Spain, and in Portugal, it overpowered every resistance.”

Flashpoints: The Emerging Crisis in Europe (2015)

Bien entendu, on peut sauter sur sa chaise comme un cabri en disant l’Europe ! l’Europe ! l’Europe ! mais cela n’aboutit à rien et cela ne signifie rien.
Interview on a presidential campaign, December 1965 INA archive of the video http://www.ina.fr/archivespourtous/index.php?vue=notice&id_notice=I00012536 (De Gaulle meant that he wanted to build a European Union on realities, i.e. the existing nation-states with their respective interests – not on slogans and abstractions)
Fifth Republic and other post-WW2

Draft of a pro-EU newspaper column https://www.thetimes.co.uk/edition/news/boris-my-case-for-britain-to-stay-in-europe-f7qgrvtps, written before submitting an anti-EU column to the Daily Telegraph, later reproduced in the Sunday Times (February 2016)
2010s, 2016

Speech (7 December 1917), Liberal Magazine, XXV (1917), p. 604, quoted in Henry R. Winkler, ‘The Development of the League of Nations Idea in Great Britain, 1914-1919’, The Journal of Modern History Vol. 20, No. 2 (Jun., 1948), p. 105

Speech to Conservative Party Conference (12 October 1990) http://www.margaretthatcher.org/document/108217
Third term as Prime Minister
Context: The toppling of the Berlin Wall. The overthrow of Ceausescu by the people he had so brutally oppressed. The first free elections in Eastern Europe for a generation. The spread of the ideas of market freedom and independence to the very heart of the Soviet Leviathan... Our friends from Eastern Europe reminded us that no force of arms, no walls, no barbed wire can for ever suppress the longing of the human heart for liberty and independence. Their courage found allies. Their victory came about because for forty long, cold years the West stood firm against the military threat from the East. Free enterprise overwhelmed Socialism. This Government stood firm against all those voices raised at home in favour of appeasement. We were criticised for intransigence. Tempted repeatedly with soft options. And reviled for standing firm against Soviet military threats. When will they learn? When will they ever learn?

The Daily Telegraph (9 June 1975), from Enoch Powell on 1992 (Anaya, 1989), p. 144
1970s

Interview with a French writer Peiper spoke with in 1967, quoted in The Devil's Adjutant by Michael Reynolds, page 260.

Speech at the Guildhall (9 November 1897), quoted in The Times (10 November 1897), p. 6
1890s

Source: 1880s, Incidents and Anecdotes of the Civil War (1885), p. 63