
“Friends can betray you, but with an old enemy, you always know where you stand.”
Source: Krondor: The Betrayal
Dexter Filkins, " Where Plan A Left Ahmad Chalabi http://select.nytimes.com/gst/tsc.html?URI=http://select.nytimes.com/preview/2006/11/05/magazine/1154652190060.html&OQ=_rQ3D1Q268tpwQ3DQ26emcQ3DtpwQ26pagewantedQ3Dprint&OP=7b29a451Q2Fvqfdv_gQ20KK_vmQ20fuQ5EfqvVQ2FQ2FJvQ7DQ7DvQ2FevTQ7CpQ7CQ5CQ5EQ7BfvQ7DQ7DeGJeVQ7DyQ2FQ2FJQ2F!i_TQ3C", New York Times Magazine, November 5, 2006.
“Friends can betray you, but with an old enemy, you always know where you stand.”
Source: Krondor: The Betrayal
“I’d have worn them as a courtesy to your friend, I’ll wear them now as a defiance to our enemies.”
Vorkosigan Saga, Winterfair Gifts (2008)
“America has no permanent friends or enemies, only interests.”
Henry Kissinger: The White House Years, quoted from Dinesh D'Souza: What's so great about America http://books.google.com/books?id=tFcDN5D1SLQC&pg=PA164&dq=kissinger+america+friends+only+interests&lr=&as_drrb_is=q&as_minm_is=0&as_miny_is=&as_maxm_is=0&as_maxy_is=&num=50&as_brr=0&ei=_UCDSs7YA6fuygTH3LTiCg&hl=sv#v=onepage&q=kissinger%20america%20friends%20only%20interests&f=false. This echoes Lord Palmerston's words: "We have no eternal allies, and we have no perpetual enemies. Our interests are eternal and perpetual".
1980s
This has sometimes been misquoted as: If I had to choose between betraying my country and betraying my friend, I hope I should have the decency to betray my country.
What I Believe (1938)
Source: What I Believe and Other Essays
Trump, Treasonous Traitor https://www.nytimes.com/2018/07/15/opinion/trump-russia-investigation-putin.html (July 15, 2018), The New York Times.
Quote
“Silence is a true friend who never betrays.”