“The possibility of victory must be there in tragedy.”

Le sujet d'une belle tragédie doit n'être pas vraisemblable.
Héraclius (1646), preface.

On Protracted Warfare (1938)
Original: (zh-CN) 指导战争的人们不能超越客观条件许可的限度期求战争的胜利，然而可以而且必须在客观条件的限度之内，能动地争取战争的胜利。战争指挥员活动的舞台，必须建筑在客观条件的许可之上，然而他们凭借这个舞台，却可以导演出很多有声有色、威武雄壮的戏剧来。

Beyond the Veil
Context: Have we lost our God? Never for one moment. Unspeakable, He is; the beneficent parent, the terrible, incorruptible judge, the champion of the innocent, the accuser of the guilty, refuge, hope, redeemer, friend; neither palace walls nor prison cells can keep Him out. Every step of our way from the birth hour He has gone with us. Were we at the gallows' foot, and deservedly, He would leave a sweet drop in the cup of death. He would measure suffering to us, but would forbid despair. The victory of goodness must be complete. The lost sheep must be found — ay, and the lost soul must turn to the way in which the peace of God prevails. We learn the dreadful danger of those who wander from the right path, but we may also learn the redeeming power which recalls and reclaims them.
So fade our heavens and hells. Christ, if he knew their secrets, did not betray them. On the boundless sea of conjecture we are still afloat, with such mental tools as we possess to guide us, with the skies, the stars, the seasons, seeking a harbor from which no voyager has ever returned.<!--
So much, the later schemes of thought have taken from us. Shall we ask what they have given us in exchange for what we have lost?

Address to the Senate (22 January 1917)
1910s
Context: It must be a peace without victory... Victory would mean peace forced upon the loser, a victor's terms imposed upon the vanquished. It would be accepted in humiliation, under duress, at an intolerable sacrifice, and would leave a sting, a resentment, a bitter memory upon which terms of peace would rest, not permanently, but only as upon quicksand. Only a peace between equals can last.

Speech on the 24th Anniversary of the Revolution http://www.youtube.com/watch?v=8IGbjPqFFvA (7 November 1941)
Stalin's speeches, writings and authorised interviews

Essentials to Peace (1953)
Context: I believe our students must first seek to understand the conditions, as far as possible without national prejudices, which have led to past tragedies and should strive to determine the great fundamentals which must govern a peaceful progression toward a constantly higher level of civilization. There are innumerable instructive lessons out of the past, but all too frequently their presentation is highly colored or distorted in the effort to present a favorable national point of view. In our school histories at home, certainly in years past, those written in the North present a strikingly different picture of our Civil War from those written in the South. In some portions it is hard to realize they are dealing with the same war. Such reactions are all too common in matters of peace and security. But we are told that we live in a highly scientific age. Now the progress of science depends on facts and not fancies or prejudice. Maybe in this age we can find a way of facing the facts and discounting the distorted records of the past.

Report on the Potsdam Conference (1945)
Context: Any man who sees Europe now must realize that victory in a great war is not something you win once and for all, like victory in a ball game. Victory in a great war is something that must be won and kept won. It can be lost after you have won it — if you are careless or negligent or indifferent.
Europe today is hungry. I am not talking about Germans. I am talking about the people of the countries which were overrun and devastated by the Germans, and particularly about the people of Western Europe. Many of them lack clothes and fuel and tools and shelter and raw materials. They lack the means to restore their cities and their factories.
As the winter comes on, the distress will increase. Unless we do what we can to help, we may lose next winter what we won at such terrible cost last spring. Desperate men are liable to destroy the structure of their society to find in the wreckage some substitute for hope. If we let Europe go cold and hungry, we may lose some of the foundations of order on which the hope for worldwide peace must rest.
We must help to the limits of our strength. And we will.

Source: The Art of War, Chapter X · Terrain