“We cannot hope to be secure when our government has declared, by its readiness "to act alone," its willingness to be everybody's enemy.”

Ma Ying-jeou (2013) cited in: " Ma reiterates commitment to use of ‘green’ power http://www.taipeitimes.com/News/taiwan/archives/2013/05/26/2003563211" in The Taipei Times, 26 May 2013.
Statement made during a visit to Chang-Kong Wind Power Station in Changhua County, Taiwan, 25 May 2013.
Economic Issues

Source: The Devil and Miss Prym‎ [O Demônio e a srta Prym] (2000), p. x; this has also been misquoted as "A moment is more than enough time for us to decide whether or not to accept our destiny."
Context: When we least expect it, life sets us a challenge to test our courage and willingness to change; at such a moment, there is no point in pretending that nothing has happened or in saying that we are not ready. The challenge will not wait. Life does not look back. A week is more than enough time for us to decide whether or not to accept our destiny.

Anarchism: Its Philosophy and Ideal (1896)

Eminent Indians (1947)

Profile in The Independent Magazine (10 March 2007)
2007

Source: Liberalism (1927), Ch. 1 : The Foundations of Liberal Policy § 10 : The Argument of Fascism
Context: Repression by brute force is always a confession of the inability to make use of the better weapons of the intellect — better because they alone give promise of final success. This is the fundamental error from which Fascism suffers and which will ultimately cause its downfall. The victory of Fascism in a number of countries is only an episode in the long series of struggles over the problem of property. The next episode will be the victory of Communism. The ultimate outcome of the struggle, however, will not be decided by arms, but by ideas. It is ideas that group men into fighting factions, that press the weapons into their hands, and that determine against whom and for whom the weapons shall be used. It is they alone, and not arms, that, in the last analysis, turn the scales.
So much for the domestic policy of Fascism. That its foreign policy, based as it is on the avowed principle of force in international relations, cannot fail to give rise to an endless series of wars that must destroy all of modern civilization requires no further discussion. To maintain and further raise our present level of economic development, peace among nations must be assured. But they cannot live together in peace if the basic tenet of the ideology by which they are governed is the belief that one's own nation can secure its place in the community of nations by force alone.
It cannot be denied that Fascism and similar movements aiming at the establishment of dictatorships are full of the best intentions and that their intervention has, for the moment, saved European civilization. The merit that Fascism has thereby won for itself will live on eternally in history. But though its policy has brought salvation for the moment, it is not of the kind which could promise continued success. Fascism was an emergency makeshift. To view it as something more would be a fatal error.

Letter to August Belmont (31 July 1832) http://quod.lib.umich.edu/l/lincoln/lincoln5/1:762?rgn=div1;view=fulltext in "The Collected Works of Abraham Lincoln" edited by Roy P. Basler, Volume V, p. 350-351
1860s
Context: Broken eggs cannot be mended; but Louisiana has nothing to do now but to take her place in the Union as it was, barring the already broken eggs. The sooner she does so, the smaller will be the amount of that which will be past mending. This government cannot much longer play a game in which it stakes all, and its enemies stake nothing. Those enemies must understand that they cannot experiment for ten years trying to destroy the government, and if they fail still come back into the Union unhurt.

2014, Sixth State of the Union Address (January 2014)
Context: For while our relationship with Afghanistan will change, one thing will not: our resolve that terrorists do not launch attacks against our country. [... ] We have to remain vigilant. But I strongly believe our leadership and our security cannot depend on our outstanding military alone. As commander in chief, I have used force when needed to protect the American people, and I will never hesitate to do so as long as I hold this office. But I will not send our troops into harm's way unless it is truly necessary, nor will I allow our sons and daughters to be mired in open-ended conflicts. We must fight the battles that need to be fought, not those that terrorists prefer from us -- large-scale deployments that drain our strength and may ultimately feed extremism. So even as we actively and aggressively pursue terrorist networks, through more targeted efforts and by building the capacity of our foreign partners, America must move off a permanent war footing. That's why I've imposed prudent limits on the use of drones, for we will not be safer if people abroad believe we strike within their countries without regard for the consequence.

Dissenting, Olmstead v. United States, 277 U.S. 438 (1928).
Judicial opinions