People must have renounced, it seems to me, all natural intelligence to dare to advance that animals are but animated machines.... It appears to me, besides, that such people can never have observed with attention the character of animals, not to have distinguished among them the different voices of need, of suffering, of joy, of pain, of love, of anger, and of all their affections. It would be very strange that they should express so well what they could not feel.
It would be very singular that all nature, all the planets, should obey eternal laws, and that there should be a little animal five feet high, who, in contempt of these laws, could act as he pleased, solely according to his caprice.
It is the poverty connected with our species which subordinates one man to another. It is not inequality which is the real misfortune, it is dependence.
Every man can educate himself. It's shameful to put one's mind into the hands of those whom you wouldn't entrust with your money. Dare to think for yourself.
Men appear to prefer ruining one another's fortunes, and cutting each other's throats about a few paltry villages, to extending the grand means of human happiness.
It is ourselves alone that make our days lucky or unlucky. Away, then, with a vain prejudice, the invention of the priesthood, which has been transmitted by our ancestors to an ignorant people.