Since my profile looks so empty, time to fill it with some quotes. Most of them reflect the same certain attitude, and one can say it is the same attitude also reflected in the TFHS series... So, in no particular order:

"People who put principles before people are people who hate people."
-Aimeric de Sanha Marsao in A Million Open Doors by John Barnes

"Fiat Iustitia Ruat Caelum" - Let Justice be done, though the heavens may fall.
-Traditional, unclear origin, but not actually of ancient times.

"Lex iniustia non est lex" - An unjust law is no law
-St Augustine

"Rhaegar fought valiantly, Rhaegar fought nobly, Rhaegar fought honorably. And Rhaegar died."
-Jorah Mormont in A Song of Ice and Fire by George R.R. Martin

"We all turn to shit when we die. But not all of us are shit before."
-Nicomo Cosca in Best Served Cold by Joe Abercombe

"The Grand Cleric cannot help you. I will not stand by and watch you treat all mages like criminals while those who would lead us bow to their Templar jailors. The Circle has failed us, Orsino. Even you should be able to see that. The time has come to act. There can be no half measures. There can be no turning back. There can be no peace. [...] I removed the chance of compromise, because there is no compromise. [...] We were already doomed. A quick death now or a slow one later, I rather go down fighting"
-Anders/Vengeance in Dragon Age 2.

"The personal, as everyone’s so fucking fond of saying, is political. So if some idiot politician, some power player, tries to execute policies that harm you or those you care about, take it personally. Get angry. The Machinery of Justice will not serve you here – it is slow and cold, and it is theirs, hardware and soft-. Only the little people suffer at the hands of Justice; the creatures of power slide from under it with a wink and a grin. If you want justice, you will have to claw it from them. Make it personal. Do as much damage as you can. Get your message across. That way, you stand a better chance of being taken seriously next time. Of being considered dangerous. And make no mistake about this: being taken seriously, being considered dangerous marks the difference - the only difference in their eyes - between players and little people. Players they will make deals with. Little people they liquidate. And time and again they cream your liquidation, your displacement, your torture and brutal execution with the ultimate insult that it’s just business, it’s politics, it’s the way of the world, it’s a tough life and that it’s nothing personal. Well, fuck them. Make it personal."
-Quellcrist Falconer in Altered Carbon by Richard K. Morgan

"The human eye is a wonderful device. With a little effort, it can fail to see even the most glaring injustice."
-ditto

"If they asked how I died tell them: Still angry."
-ditto

"Do you hear the people sing,
singing the song of angry men,
it is the music of a people
who will not be slaves again"
-Les Misérables

"Rules are not necessarily sacred, principles are."
-Franklin Roosevelt

"To punish the oppressors of humanity is clemency; to forgive them is cruelty."
-Maximilian Robespierre

"Any institution which does not suppose the people good, and the magistrate corruptible, is evil."
-Maximilian Robespierre

"Bonitas non est pessimis esse meliorem"
(To be good, it is not enough to better than the worst)
-Lucius Annaeus Seneca

Not to speak is to speak. Not to act is to act."
-Dietrich Bonhöffer

"Friede den Hütten! Krieg den Palästen!"
(Peace to the huts, war to the palaces)
-Georg Büchner, Der Hessische Landbote

"The way of life can be free and beautiful. But we have lost the way. Greed has poisoned men's souls, has barricaded the world with hate; has goose-stepped us into misery and bloodshed. We have developed speed, but we have shut ourselves in; machinery that gives abundance has left us in want. Our knowledge has made us cynical, our cleverness hard and unkind. We think too much and feel too little. More than machinery we need humanity, more than cleverness we need kindness and gentleness."
-The unnamed protagonist's speech in The Great Dictator by Charlie Chaplin

"Soldiers: don't give yourselves to brutes, men who despise you and enslave you, who regiment your lives, tell you what to do, what to think and what to feel, who drill you, diet you, treat you as cattle, as cannon fodder!
-ditto

"The philosophers have only interpreted the world, in various ways. The point, however, is to change it."
-Karl Marx, "Theses on Feuerbach", also his grave epitaph.

"Religious suffering is, at one and the same time, the expression of real suffering and a protest against real suffering. Religion is the sigh of the oppressed creature, the heart of a heartless world, and the soul of soulless conditions. It is the opium of the people."
-Karl Marx, often quoted as "Religion is the opium of the people".

"The proletarians have nothing to lose but their chains. They have a world to win."
-Karl Marx, Communist Manifesto

"Criticism of religion is the requirement for all criticism"
-Karl Marx

"Freedom is to transform the state into an institution above society to an institution below society"
-Karl Marx, Criticism of the Gotha Program

"Social progress can be measured exactly according to the standing of [women]"
-Karl Marx

"The oppressed are allowed once every few years to decide which particular representatives of the oppressing class shall represent and repress them in parliament. "
-Vladimir Lenin

"God did not make man in His image; on the contrary man made God in his image."
-Ludwig Feuerbach

"True peace is not merely the absence of tension: it is the presence of justice."
-Martin Luther King (Also in slogan form: "No peace without justice!" )

"A riot is the language of the unheard. "
-Martin Luther King

"We know through painful experience that freedom is never voluntarily given by the oppressor; it must be demanded by the oppressed."
-Martin Luther King, Letter from Birmingham Jail

"One has not only a legal, but a moral responsibility to obey just laws. Conversely, one has a moral responsibility to disobey unjust laws."
-ditto

"I don't even call it violence when it's in self-defence, I call it intelligence"
-Malcolm X

"Don’t lay down our life all by itself. No, preserve your life. it’s the best thing you got. And if you got to give it up, let it be even-steven."
-Malcolm X, Message to the Grass Roots

"I don’t usually deal with those big words because I don’t usually deal with big people. I deal with small people. I find you can get a whole lot of small people and whip hell out of a whole lot of big people. They haven’t got anything to lose, and they’ve got every thing to gain. And they’ll let you know in a minute: 'It takes two to tango; when I go, you go' "
-Malcolm X, The Ballot or the Bullet

"We want freedom now, but we’re not going to get it saying 'We Shall Overcome'. We’ve got to fight until we overcome."
-ditto

"Any time you know you’re within the law, within your legal rights, within your moral rights, in accord with justice, then die for what you believe in. But don’t die alone. Let your dying be reciprocal. This is what is meant by equality. What’s good for the goose is good for the gander."
-ditto

"Be peaceful, be courteous, obey the law, respect everyone; but if someone puts his hand on you, send him to the cemetery."
-Malcolm X

"Usually, when people are sad, they don’t do anything. They just cry over their condition. But when they get angry, they bring about a change. When they get angry, they aren't interested in logic, aren't interested in odds, aren't interested in consequences. When they get angry, they realize the condition that they’re in- that their suffering is unjust… and that anything they do to correct it… they’re justified."
-Malcolm X (Don't get sad, get mad!)

"You're not to be so blind with patriotism that you can't face reality. Wrong is wrong, no matter who does it or says it."
-Malcolm X (ME Alliance fanboys, take note)

"Every gun that is made, every warship launched, every rocket fired signifies, in the final sense, a theft from those who hunger and are not fed, those who are cold and are not clothed."
-Dwight D. Eisenhower, "Cross of Iron" speech

"A little rebellion now and then is a good thing."
-Thomas Jefferson

"The only way to get rid of temptation is to yield to it."
-Oscar Wilde

"Nothing is settled permanently that is not settled right."
-Proverb

"I am not Christ or a philanthropist, old lady, I am all the contrary of a Christ... I fight for the things I believe in, with all the weapons at my disposal and try to leave the other man dead so that I don't get nailed to a cross or any other place."
-Che Guevara

"If you tremble with indignation at every injustice, then you are a comrade of mine."
-Che Guevara

"Justice remains the tool of a few powerful interests; legal interpretations will continue to be made to suit the convenience of the oppressor power."
-Che Guevara, On Development

"The life of a single human being is worth a million times more than all the property of the richest man on earth."
-Che Guevara, On Revolutionary Medicine

"I know you are here to kill me. Shoot, coward, you are only going to kill a man."
-Che Guevara's last words (disputed)

And some good rejection of calls for surrender...

"Nuts!"
General Anthony McAuliffe to the Germans at the Battle of the Bulge

"Molon labe"
King Leonidas of Sparta to the Persian High King Xerxes at the Battle of Thermopylae

"Peace and Capitulation" - "War and Knife"
General José de Palafox' reply to the French call to surrender at the 2nd Siege of Saragossa. May have been the origin of the phrase "War to the knife".