• "In all circumstances, it is the duty of the Socialists, and especially of the Anarchists, to do everything that can weaken the State and the capitalist class, and to take as the only guide to their conduct the interest of Socialism; or, if they are materially powerless to act efficaciously for their own cause, at least to refuse any voluntary help to the cause of the enemy, and stand aside to save at least their principles—which means to save the future."
• "...the oppressed are always in a state of legitimate self-defense, and have always the right to attack the oppressors."
• "...the mission of those who, like us, wish the end of all oppression and of all exploitation of man by man, is to awaken a consciousness of the antagonism of interests between dominators and dominated, between exploiters and workers, and to develop the class struggle inside each country, and the solidarity among all workers across the frontiers, as against any prejudice and any passion of either race or nationality."