„Don't fight a battle if you don't gain anything by winning.“

„One thing remains the same, your task and your duty. You are required to ensure the security of this country against any offence. What is that means for you? That means, that you should have to fight, a fight to win. There is no roof for losers, if you loose don't come back.“

—  Sam Manekshaw First Field marshal of the Indian Army 1914 - 2008

During Speech at Passing Out Parade of Indian Military Academy A Soldier's Duty http://worldofdefense.blogspot.in/2011/05/soldiers-duty-field-marshal-sam.html

„They may fight with us, but they don't fight for us.“

—  Christopher Paolini, livro Eldest

Fonte: Eldest

„Sometimes there's nothing you can do. […] Sometimes they don't have enough to fight with.“

—  Tamora Pierce, Briar's Book

Fonte: Briar's Book

„No, thank you," said Adrian. "These hands don't sully themselves with fighting.“

—  Richelle Mead, Bloodlines

Fonte: Bloodlines

„Be kind, for everyone you meet is fighting a great battle.“

—  Philo Roman philosopher -15 - 45 a.C.

Attributed to Philo in How Do We Know When It's God?: A Spiritual Memoir (1999) by Dan Wakefield. It has also been wrongly attributed to Plato and Ephrem the Syrian. It is a variant of the Christmas message "Be pitiful, for every man is fighting a hard battle," written by the Scottish preacher Ian Maclaren (also known as John Watson) in 1897.
Be Kind; Everyone You Meet is Fighting a Hard Battle. Plato? Philo of Alexandria? http://quoteinvestigator.com/2010/06/29/be-kind/.
Misattributed

„Be kind, for everyone you meet is fighting a hard battle.“

—  Platón Classical Greek philosopher -427 - -347 a.C.

Attributed to Plato in No Ordinary Moments: A Peaceful Warrior's Guide to Daily Life (1992) by Dan Millman. It has also been wrongly attributed to Philo. It is a variant of the Christmas message "Be pitiful, for every man is fighting a hard battle," written by the Scottish preacher Ian Maclaren (also known as John Watson) in 1897.
Be Kind; Everyone You Meet is Fighting a Hard Battle. Plato? Philo of Alexandria? http://quoteinvestigator.com/2010/06/29/be-kind/
Misattributed

„Be kind, for everyone you meet is fighting a hard battle.“

—  Ian Maclaren British theologian and writer 1850 - 1907

The British Weekly, 1897. http://quoteinvestigator.com/2010/06/29/be-kind/
Misattributed
Variante: Be pitiful, for every man is fighting a hard battle.

„Don't go fighting against the Spring.“

—  E.M. Forster, livro A Room with a View

Fonte: A Room with a View

„Free men cannot start a war, but once it is started, they can fight on in defeat. Herd men, followers of a leader, cannot do that, and so it is always the herd men who win battles and the free men who win wars.“

—  John Steinbeck, livro The Moon Is Down

Fonte: The Moon Is Down

„Don't fight forces, use them.“

—  Buckminster Fuller American architect, systems theorist, author, designer, inventor and futurist 1895 - 1983

In Shelter (May 1932), 2 No. 4, 36, and (Nov 1932) No. 5, 108. Cited in Richard Buckminster Fuller, Joachim Krausse (ed.) and Claude Lichtenstein (ed.), Your Private Sky: Discourse (2001), 17; sometimes quoted or paraphrased as "Don't oppose forces, use them."
1920s–1950s

„The fight isn't over until you win.“

—  Robin Hobb, livro Royal Assassin

Fonte: Royal Assassin

„And fighting the battle of life is fighting against fearful odds, too. There are giants and dragons in this nineteenth century, and the golden casket that they guard is not so easy to win as it appears in the story-books.“

—  Jerome K. Jerome, livro Idle Thoughts of an Idle Fellow

Idle Thoughts of an Idle Fellow (1886)

„Any fool can fight a winning battle, but it needs character to fight a losing one, and that should inspire us; which reminds me that I dreamed the other night that I was being hanged, but was the life and soul of the party.“

—  W.B. Yeats Irish poet and playwright 1865 - 1939

„Any coward can fight a battle when he's sure of winning; but give me the man who has pluck to fight when he's sure of losing. That's my way, sir; and there are many victories worse than a defeat.“

—  George Eliot, livro Scenes of Clerical Life

" Janet's Repentance http://classiq.net/george-eliot/janets-repentance/index.html" Ch. 6
Scenes of Clerical Life (1858)

„A trooper fights for honor … or from loyalty. Or for loot sometimes. But he waits for pay. He will not wait without it, because when there is no fighting there is no honor to win, no flag to die for, no loot to gain.“

—  Gene Wolfe American science fiction and fantasy writer 1931 - 2019

Volume 4: Exodus from the Long Sun (1996), Ch. 9
Fiction, The Book of the Long Sun (1993–1996)

„(letter adressed to Mihai Antonescu, 6 september 1941) „We must all understand that this is not a fight against Slavs, but against the Jews. It's a battle for life and death. Either we win and the world will purify, or they'll win and we'll become their slaves. Both the war in general and the battles at Odessa, especially, have made the proof that the Jew is Satan.“

—  Ion Antonescu prime minister and conducător of Romania during World War II 1882 - 1946

Fonte: https://www.youtube.com/watch?v=EJodTuDeoYg

„Be kind, for everyone you meet is fighting a battle you know nothing about.“

—  Wendy Mass American children's writer 1967

Fonte: The Candymakers

„First they ignore you, then they laugh at you, then they fight you, then you win.“

—  Махатма Ганди pre-eminent leader of Indian nationalism during British-ruled India 1869 - 1948

Describing the stages of a winning strategy of nonviolent activism. There is no record of Gandhi saying this. A close variant of the quotation first appears in a 1918 US trade union address by Nicholas Klein:
:* And, my friends, in this story you have a history of this entire movement. First they ignore you. Then they ridicule you. And then they attack you and want to burn you. And then they build monuments to you. And that, is what is going to happen to the Amalgamated Clothing Workers of America.
::* Proceedings of the Third Biennial Convention of the Amalgamated Clothing Workers of America (1918), p. 53 http://books.google.com/books?id=QrcpAAAAYAAJ&pg=PA53&dq=%22First+they+ignore+you%22
In Freedom's Battle (1922), Gandhi wrote this:
:* Unfortunately for His Excellency the movement is likely to grow with ridicule as it is certain to flourish on repression. No vital movement can be killed except by the impatience, ignorance or laziness of its authors. A movement cannot be 'insane' that is conducted by men of action as I claim the members of the Non-co-operation Committee are. … Ridicule is like repression. Both give place to respect when they fail to produce the intended effect. … It will be admitted that non-co-operation has passed the stage [of] ridicule. Whether it will now be met by repression or respect remains to be seen. … But the testing time has now arrived. In a civilized country when ridicule fails to kill a movement it begins to command respect.
::* Source: The Project Gutenberg EBook of Freedom's Battle, 2nd edition, by Mahatma Gandhi, 1922 http://www.gutenberg.net/1/0/3/6/10366/10366-h/10366-h.htm
Misattributed

„I fight on, I fight to win.“

—  Margaret Thatcher British stateswoman and politician 1925 - 2013

Remarks to journalists in Downing Street (21 November 1990) http://www.margaretthatcher.org/speeches/displaydocument.asp?docid=108252, following the inconclusive first ballot in the Conservative leadership election.
Third term as Prime Minister