If everyone is my brother, I have no brothers. - Pierre-Joseph Proudhon

Ontology, as a science of substances and causes, is impossible; We know beings only by their relations: however, as it is necessary, for the needs of science, to distinguish in each of its aspects this great whole that we call the UNIVERSE, we have given special names to things known and unknown, to the visible and invisible, to those that we know and that we believe.

To-day, the man who pays taxes to the amount of two hundred francs is virtuous; the talented man is the honest pickpocket: such truths as these are accounted trivial.

That in morals, as in all other branches of knowledge, the gravest errors are the dogmas of science; that, even in works of justice, to be mistaken is a privilege which ennobles man; and that whatever philosophical merit may attach to me is infinitely small. To name a thing is easy: the difficulty is to discern it before its appearance. In giving expression to the last stage of an idea, — an idea which permeates all minds, which to-morrow will be proclaimed by another if I fail to announce it to-day, — I can claim no merit save that of priority of utterance. Do we eulogize the man who first perceives the dawn?