The primary and most beautiful of nature's qualities is motion

Certain souls seem hard because they are capable of strong feelings, and they sometimes go to rather extreme lengths; their apparent unconcern and cruelty are but ways, known only to themselves, of feeling more strongly than others.

Nature, who for the perfect maintenance of the laws of her general equilibrium, has sometimes need of vices and sometimes of virtues, inspires now this impulse, now that one, in accordance with what she requires.

Evil is... a moral entity and not a created one, an eternal and not a perishable entity: it existed before the world; it constituted the monstrous, the execrable being who was also to fashion such a hideous world. It will hence exist after the creatures which people this world

Happiness is ideal, it is the work of the imagination.

Chimerical and empty being, your name alone has caused more blood to flow on the face of the earth than any political war ever will. Return to the nothingness from which the mad hope and ridiculous fright of men dared call you forth to their misfortune. You only appeared as a torment for the human race. What crimes would have been spared the world, if they had choked the first imbecile who thought of speaking of you.

Sensual excess drives out pity in man.