“I am always late on principle, my principle being that punctuality is the thief of time.”

as quoted in his Urdu language message, published in the report of National Annual Conference-2004 and Award Ceremony on the International Day of Human Rights, page-14 ( December 9, 2004 at Islamabad –Pakistan http://www.ihro.org.pk/downloads/4th%20Annual%20conference%20report.pdf/) organized by International Human Rights Observer http://www.ihro.org.pk/ Retrieved July 23, 2016

telegraph.co.uk http://www.telegraph.co.uk/news/worldnews/vladimir-putin/9731278/Dmitry-Medvedev-muses-on-aliens-and-Vladimir-Putins-lateness.html

As quoted in Caught Between the Dog and the Fireplug, or, How to Survive Public Service (2001) by Kenneth H. Ashworth, p. 11

Letter to Dr Richard Brocklesby (c. 1790s), quoted in R. B. McDowell (ed.), The Correspondence of Edmund Burke, Volume IX: May 1796–July 1797 (Cambridge University Press, 1970), p. 446
Undated

Source: "Yanukovych: 'I Was Wrong' To Ask Russian Troops Into Crimea" in NPR https://www.npr.org/sections/thetwo-way/2014/04/02/298385578/yanukovych-i-was-wrong-to-ask-russian-troops-into-crimea (2 April 2014)

Boston Massacre Oration (1774)
Context: I have always, from my earliest youth, rejoiced in the felicity of my fellow-men; and have ever considered it as the indispensable able duty of every member of society to promote, as far as in him lies, the prosperity of every individual, but more especially of the community to which he belongs; and also, as a faithful subject of the State, to use his utmost endeavors to detect, and having detected, strenuously to oppose every traitorous plot which its enemies may devise for its destruction. Security to the persons and properties of the governed is so obviously the design and end of civil government, that to attempt a logical proof of it would be like burning tapers at noonday, to assist the sun in enlightening the world; and it cannot be either virtuous or honorable to attempt to support a government of which this is not the great and principal basis; and it is to the last degree vicious and infamous to attempt to support a government which manifestly tends to render the persons and properties of the governed insecure. Some boast of being friends to government; I am a friend to righteous government, to a government founded upon the principles of reason and justice; but I glory in publicly avowing my eternal enmity to tyranny.

Source: Autobiography of Mark Twain, Vol. 3 (2015), p. 451

Vorkosigan Saga, A Civil Campaign (1999)
Variant: The principal difference between heaven and hell is the company you keep there.

Opening sentence of his "underground colloquium" in March 1983, as quoted by Nicolas Gisin in an edition by [J. S. Bell, Reinhold A. Bertlmann, Anton Zeilinger, Quantum [un]speakables: from Bell to quantum information, Springer, 2002, 3540427562, 199]