„So the whole war is because we can't talk to each other.“

This is almost always attributed to US Ambassador Francis Meehan http://www.nndb.com/people/060/000121694/, though without citations, and only very rarely to Patton.
Misattributed

Origine: Adaptation.: The Shooting Script

Rejoinder when told that he couldn't talk about physics, because "nobody [at this table] knows anything about it."
Part 5: "The World of One Physicist", "Alfred Nobel's Other Mistake", p. 310.
Quoted in Handbook of Economic Growth (2005) by Philippe Aghion and Steven N. Durlauf.
Surely You're Joking, Mr. Feynman! (1985)

G. M. Young, Stanley Baldwin (1952), p. 31
Undated

Nicholas Sparks, Chapter 9, p. 138
2000s, Three Weeks with My Brother (2004)

Ce qui fait que les amants et les maîtresses ne s'ennuient point d'être ensemble, c'est qu'ils parlent toujours d'eux-mêmes.
Variant translation: What makes lovers and their mistresses never weary of being together is that they are always talking about themselves.
Maxim 312.
Reflections; or Sentences and Moral Maxims (1665–1678)

Origine: The Temple of My Familiar

On her song "Running Up That Hill (A Deal with God)", in a Radio 1 Classic Albums interview with Richard Skinner (26 January 1992) http://gaffa.org/cloud/music/running_up_that_hill.html
Contesto: I was trying to say that, really, a man and a woman, can't understand each other because we are a man and a woman. And if we could actually swap each other's roles, if we could actually be in each other's place for a while, I think we'd both be very surprised! … And I think it would lead to a greater understanding. And really the only way I could think it could be done was either... you know, I thought a deal with the devil, you know. And I thought, "well, no, why not a deal with God!" You know, because in a way it's so much more powerful the whole idea of asking God to make a deal with you. You see, for me it is still called "Deal With God", that was its title. But we were told that if we kept this title that it would not be played in any of the religious countries, Italy wouldn't play it, France wouldn't play it, and Australia wouldn't play it! Ireland wouldn't play it, and that generally we might get it blacked purely because it had God in the title.

The Question of German Guilt (1947)
Contesto: We are sorely deficient in talking with each other and listening to each other. We lack mobility, criticism and self-criticism. We incline to doctrinism. What makes it worse is that so many people do not really want to think. They want only slogans and obedience. They ask no questions and they give no answers, except by repeating drilled-in phrases. They can only assert and obey, neither probe nor apprehend. Thus they cannot be convinced, either. How shall we talk with people who will not go where others probe and think, where men seek independence in insight and conviction?

2010s, 2016 Democratic National Convention (2016)

Origine: The Human Condition

Lillian Gish

Fitzgerald News Conference from nytimes.com (October 28, 2005) http://www.nytimes.com/2005/10/28/politics/28text-fitz.html?pagewanted=all

Origine: The End of the Affair

Betsy and I Are Out (1871)

Origine: La Mécanique du cœur