"Everyone calls himself a friend, but only a fool relies on it; nothing is commoner than the name, no..." — Jean de La Fontaine

It is twice the pleasure to deceive the deceiver.

It is a double pleasure to deceive the deceiver.

Everyone has his faults which he continually repeats: neither fear nor shame can cure them.

Anyone entrusted with power will abuse it if not also animated with the love of truth and virtue, no matter whether he be a prince, or one of the people.