“Whoso desireth to govern well and securely, it behoveth him to have a vigilant eye to the proceedings of great princes, and to consider seriously of their designs.”

1860s, First Inaugural Address (1861)

Qui dit examen, dit révolte.Toute révolte est, ou le manteau sous lequel se cache un prince, ou les langes d'une domination nouvelle.
Source: About Catherine de' Medici (1842), Part I: The Calvinist Martyr, Ch. I: A House Which No Longer Exists at the Corner of a Street Which No Longer Exists in a Paris Which No Longer Exists.

[Chaturvedi, Pradeep, Women and Food Security: Role of Panchayats, http://books.google.com/books?id=IuKV5ak57asC&pg=PA46, 1 January 2002, Concept Publishing Company, 978-81-7022-873-8, 46–]

Source: The Cabinet Council (published 1658), Chapter 25

Letter to Spencer Roane (9 March 1821)
1820s

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.

Book VI: Social Physics, Ch. II: Principle Philosophical Attempts to Constitute a Social System
The Positive Philosophy of Auguste Comte (1853)

1990s
Context: We have depended on government for so much for so long that we as people have become less vigilant of our liberties. As long as the government provides largesse for the majority, the special interest lobbyists will succeed in continuing the redistribution of welfare programs that occupies most of Congress's legislative time.

Speech in the House of Representatives, September 17, 1997

Reflections on the Revolution in France (1790)