Correspondance: 1932-1960, p.220, Gallimard, 1981. Letter to Jean Granier, 1957 https://books.google.com.br/books?id=56VcAAAAMAAJ&q=le+train+du+monde+m%27accable+en+ce+moment.+a+longue+%C3%A9ch%C3%A9ance,+tous+les+continents+(jaune,+noir+et+bistre)&dq=le+train+du+monde+m%27accable+en+ce+moment.+a+longue+%C3%A9ch%C3%A9ance,+tous+les+continents+(jaune,+noir+et+bistre)&hl=pt-BR&sa=X&ved=0CCEQ6AEwAWoVChMIqfiA3aHcyAIVgw6QCh3IngRL
Albert Camus: Citáty anglicky (strana 6)
Albert Camus byl francouzský spisovatel a novinář. Citáty anglicky.“There are causes worth dying for, but none worth killing for.”
Widely attributed to Camus on the internet, the earliest attribution of such a statement to him yet located is an unsourced citation in Quotations from the Wayside (1999) by Brenda Wong: "Many things are worth dying for, but none worth killing for." The earliest occurrence yet located of such a statement, by anyone, is one by Albert Dietrich in a 31 January 1943 letter to his conscientious objector status Hearing Officer, reported in Army GI, Pacifist CO : The World War II Letters of Frank and Albert Dietrich (2005) https://books.google.co.uk/books?id=3o4JN_C69VwC edited by Scott H. Bennett: "There are perhaps many causes worth dying for, but to me, certainly, there are none worth killing for."
Prior to the attribution to Camus, the most widely publicized occurrence of such an expression was probably in the song "Too Long A Soldier" https://www.youtube.com/watch?v=YoQcU1ecPOc by Neil Giraldo and Myron Grombacher, sung by Pat Benatar on her album Wide Awake In Dreamland (1988): "I've seen so much worth dying for, so little worth killing over."
Misattributed
"Three Interviews" in Lyrical and Critical Essays (1970)
“We all have a weakness for beauty.”
The First Man (1960; published in 1994)
“Existence is illusory and it is eternal.”
Kirilov
The Myth of Sisyphus (1942), Absurd Creation
“There is always a philosophy for lack of courage.”
Il y a toujours une philosophie pour le manque de courage.
Notebooks (1942–1951)
"Hope and the Absurd in the work of Franz Kafka"
The Myth of Sisyphus (1942)
To be found on quotes sites, but always without citation.
Disputed
“Knowing whether or not one can live without appeal is all that interests me.”
The Myth of Sisyphus (1942), An Absurd Reasoning
“Fiction is the lie through which we tell the truth.”
Pablo Picasso said something very similar. Perhaps it is the source? From Herschel B. Chipp’s Theories of Modern Art: "We all know that Art is not truth. Art is a lie that makes us realize truth, at least the truth that is given us to understand."
Disputed