¿Y para qué debo arrepentirme de lo que he hecho, si no puedo dejar de hacer lo que hago, que es lo que he hecho?
Voces (1943)
“I cannot help regretting that honourable gentlemen on the other side of this House should, in all the views which they announce on questions of foreign policy, seem always, by some fatality, to sympathize with arbitrary and despotic government. I cannot help regretting that they should view with averted and disdainful eye the efforts of every country which is endeavouring to establish freedom, and that they should condemn those so pointedly, who, by good offices or friendly co-operation, engage in the attempt to assist such nations in forming free establishments”
Speech in the House of Commons (10 March 1837), quoted in George Henry Francis, Opinions and Policy of the Right Honourable Viscount Palmerston, G.C.B., M.P., &c. as Minister, Diplomatist, and Statesman, During More Than Forty Years of Public Life (London: Colburn and Co., 1852), p. 331.
1830s
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Henry Temple, 3rd Viscount Palmerston 72
British politician 1784–1865Related quotes

Thoughts on Man's Purpose in Life (1974), Exchange with Admiral Rickover (1982)
Context: I do not have regrets. I believe I helped preserve the peace for this country. Why should I regret that? What I accomplished was approved by Congress — which represents our people. All of you live in safety from domestic enemies because of security from the police. Likewise, you live in safety from foreign enemies because our military keeps them from attacking us. Nuclear technology was already under development in other countries. My assigned responsibility was to develop our nuclear navy. I managed to accomplish this.

As quoted in "Dalai Lama says 'too many' refugees in Europe" http://timesofindia.indiatimes.com/world/europe/Dalai-Lama-says-too-many-refugees-in-Europe/articleshow/52522387.cms, The Times of India (31 May 2016)

Speech in the House of Commons (11 March 1935); published in Hansard, House of Commons, 5th series, vol. 299 cols. 50-1.
1935

1860s, 1864, Letter to James Guthrie (August 1864)

2003
Press conference in Mosul, Iraq (July 21, 2003) Commentary on comments by Wolfowitz http://home.earthlink.net/~platter/neo-conservatism/wolfowitz.html.
The Day of the Pygmies. p. 91-92.
The Light's On At Signpost (2002)

“I do this so you cannot help but hear. A wise man views a moonless night with fear.”
Source: The Wise Man's Fear

1920s, The Genius of America (1924)
Context: It is my belief that those who live here and really want to help some other country, can best accomplish that result by making themselves truly and wholly American. I mean by that, giving their first allegiance to this country and always directing their actions in a course which will be first of all for the best interests of this country. They cannot help other nations by bringing old world race prejudices and race hatreds into action here. In fact, they can best help other countries by scrupulously avoiding any such motives. It can be taken for granted that we all wish to help Europe. We cannot secure that result by proposing or taking any action that would injure America. Nor can we secure it by proposing or taking any action that would seriously injure some European country.