“Sane people did what their neighbors did, so that if any lunatics were at large, one might know and avoid them.”

Source: 1984

Qui n'a pas vécu dans les années voisines de 1789 ne sait pas ce que c'est le plaisir de vivre.
Reported in Memoirs pour Servir a l'histoire de nous Temps by François Guizot, Volume I, p. 6.

"Forgiveness" (7 July 2007)
Context: If that is not the case, then we are talking about something that happened in the past, even if it was today, this morning, but it's over. You know, there are people dead and buried in their graves still affecting people, because no one ever forgave them for what they did — that's what not forgiving does — it lets an event live and live with bitterness and hurt, when it needs to be let go.

Source: The Lives of Animals (1999), p. 19

Speech http://hansard.millbanksystems.com/commons/1936/dec/10/members-of-the-house-of-commons in the House of Commons on the Abdication of Edward VIII (10 December 1936).
1936
Context: I saw the King on Monday, 16th November, and I began by giving him my view of a possible marriage. I told him that I did not think that a particular marriage was one that would receive the approbation of the country. That marriage would have involved the lady becoming Queen. I did tell His Majesty once that I might be a remnant of the old Victorians, but that my worst enemy would not say of me that I did not know what the reaction of the English people would be to any particular course of action, and I told him that so far as they went I was certain that that would be impracticable.

Attributed to Addison in (K)new Words: Redefine Your Communication (2005), by Gloria Pierre, p. 120, there are no indications of such a statement in Addison's writings.
Misattributed

Source: By the Time You Read This, I'll Be Dead

Source: Damage

Source: The God Delusion (2006), p. 118 of the Black Swan paperback edition of 2007