Classifications, in all things, are illusions of the mind, for nature hates identity and never repeats herself: there are not two grains of sand, not two drops of water, not two leaves alike; and most probably the sun, since the commencement of its existence, has not appeared twice identically the same at its rising. Yet despite the evidence of these truths, despite the conviction which we have attained of the illusion of the senses, of the weakness of our intellect, which can know nothing of the inmost nature of beings; which can only seize upon a few fleeting traces of their personal characteristics; yet despite all these things we dare establish series, attribute to them characteristics which are speedily contradicted by facts, and torture and do violence to the only beings that really exist; namely, individuals, in the name of that other thing which exists only in our sick brain: kind, class! The bitter fruits that have been produced by our mania for classification ought to cure us of this. Has not this malady, impelling theocratists and legislators to divide humanity into castes and classes, caused most of the calamities of our species? Have we not, thanks to these execrable divisions, a hideous past, the echoes of which bring back to our shrinking ears naught but sobs, cries of anger, rebellion, malediction and vengeance, and sinister clanking of weapons and chains? Have we not also to thank them that, on the pages of our history, all stained with blood and tears and exhaling an odor of the charnel house, we read nought but tyranny, brutishness and demoralization? Have we not further to thank them that king and subject, master and serf, white and black, man and woman become demoralized by oppression, injustice and cruelty on one hand; and intrigue, baseness, and vengeance on the other? Are not wrong and wretchedness found everywhere, because inequality, the offspring of insane classifications, is found everywhere? Ah! who shall deliver us from our infatuation! Let us class animals, vegetables, minerals if we will! our errors do not influence and cannot disturb them; but let us respect the human species which will escape all classification, however reasonable the process may be, because every human being is changeable, progressive, and differs far more from his fellows than the most intelligent animal from the rest of his species. Let us leave each one then to make his own autonomic law and to manifest himself in conformity with his nature, and take care only that right shall be equal for all; that the strong shall not oppress the weak; that each function shall be entrusted to the one individual that is proved the best qualified to perform it; this is all that we can do, all that we should do, if we seek to show ourselves wise and just.