I often had no scruples about deceiving nitwits and scoundrels and fools when I found it necessary. ...We avenge intelligence when we deceive a fool, and... deceiving a fool is an exploit worthy of an intelligent man. What has infused my very blood with an unconquerable hatred of the whole tribe of fools from the day of my birth is that I become a fool myself when I am in their company.
Giacomo CasanovaWhen a man gets it into his head to do something, and when he exclusively occupies himself in that design, he must succeed, whatever the difficulties. That man will become Grand Vizier or Pope.
Giacomo Casanova