The Church worked hard at it night and day during nine centuries and imprisoned, tortured, hanged, and burned whole hordes and armies of witches, and washed the Christian world clean with their foul blood. Then it was discovered that there was no such thing as witches, and never had been. One doesn't know whether to laugh or to cry. Who discovered that there was no such thing as a witch - the priest, the parson? No, these never discover anything.
The perfection of wisdom, and the end of true philosophy is to proportion our wants to our possessions, our ambitions to our capacities, we will then be a happy and a virtuous people.
The fact that man knows right from wrong proves his intellectual superiority to the other creatures; but the fact that he can do wrong proves his moral inferiority to any creatures that cannot.