I’ve always been fond of this quote from Errico Malatesta, an anarchist*:
“Violence (physical force) used to another’s hurt, which is the most brutal form of struggle between men can assume, is eminently corrupting. It tends, by its very nature, to suffocate the best sentiments of man, and to develop all the antisocial qualities, ferocity, hatred, revenge, the spirit of domination and tyranny, contempt of the weak, servility towards the strong. And this harmful tendency arises also when violence is used for a good end. […] Anarchists who rebel against every sort of oppression and struggle for the integral liberty of each and who ought thus to shrink instinctively from all acts of violence which cease to be mere resistance to oppression and become oppressive in their turn are also liable to fall into the abyss of brutal force. […] The excitement caused by some recent explosions and the admiration for the courage with which the bomb-throwers faced death, suffices to cause many anarchists to forget their program, and to enter on a path which is the most absolute negation of all anarchist ideas and sentiments.”
*Equating anarchism with chaos always triggers me. But I can’t fault the noob for that.