“I abhor unjust war. I abhor injustice and bullying by the strong at the expense of the weak, whether among nations or individuals. I abhor violence and bloodshed. I believe that war should never be resorted to when, or so long as, it is honorably possible to avoid it. I respect all men and women who from high motives and with sanity and self-respect do all they can to avert war. I advocate preparation for war in order to avert war; and I should never advocate war unless it were the only alternative to dishonor.”

On Protracted Warfare (1938)
Original: (zh-CN) 历史上的战争分为两类，一类是正义的，一类是非正义的。一切进步的战争都是正义的，一切阻碍进步的战争都是非正义的。我们共产党人反对一切阻碍进步的非正义的战争，但是不反对进步的正义的战争。对于后一类战争，我们共产党人不但不反对，而且积极地参加。前一类战争，例如第一次世界大战，双方都是为着帝国主义利益而战，所以全世界的共产党人坚决地反对那一次战争。反对的方法，在战争未爆发前，极力阻止其爆发；既爆发后，只要有可能，就用战争反对战争，用正义战争反对非正义战争。

Epistulae ad Atticum (Letters to Atticus) Book VII, Letter 14, section 3; as translated by E.O. Winstedt in the Loeb Classical Library http://archive.org/stream/letterstoatticus02ciceuoft#page/68/mode/2up

Speech in London, as quoted in Memorial Life of Gen. Ulysses S. Grant (1889) Edited by y Stephen Merrill Allen, p. 95.
1880s

Speaking in Carnegie Hall, New York City, on 4 April 1919.

Context: As a soldier who has spent a quarter of his life in the study of the science of arms, let me tell you I went into the British Army believing that if you want peace you must prepare for war. I believe now that if you prepare thoroughly and efficiently for war, you get war.

1910s, The World Movement (1910)

2000s
Context: Antonin Scalia: It's erected as a war memorial. I assume it is erected in honor of all of the war dead. It's the — the cross is the — is the most common symbol of — of — of the resting place of the dead, and it doesn't seem to me — what would you have them erect? A cross — some conglomerate of a cross, a, and you know, a Moslem half moon and star?
Peter Eliasberg: Well, Justice Scalia, if I may go to your first point. The cross is the most common symbol of the resting place of Christians. I have been in Jewish cemeteries. There is never a cross on a tombstone of a Jew. [Laughter. ] So it is the most common symbol to honor Christians.
Antonin Scalia: I don't think you can leap from that to the conclusion that the only war dead that that cross honors are the Christian war dead. I think that's an outrageous conclusion.

Speech to the Senate (11 October 1919), quoted in George Bernard Noble, Policies and Opinions at Paris, 1919 (New York: Macmillan, 1935), p. 353
Prime Minister

Source: The Mouse that Roared, p. 145.

Michael Lovett, in Ch. 18
Barbary Shore (1951)