Final causes or intentions are the torment of modern philosophy, which neglects nothing to get rid of them. From this, among other things, comes its great axiom: nature creates only individuals. Indeed, since all classification supposes order, this philosophy has denied classes to deny order. In order to establish this marvellous reasoning, it fixes its suspicious eyes on the differences between beings to dispense itself from turning them to their similarities. It does not want to recognize that nuances between classes and individuals constitute another order, and that diversity in resemblance supposes intention more visibly than mere resemblance.