Fanaticism is a fire, which heats the mind indeed, but heats without purifying. It stimulates and ferments all the passions; but it rectifies none of them.
The skilful disputant well knows that he never has his enemy at more advantage than when, by allowing the premises, he shows him arguing wrong from his own principles.
Without enthusiasm, the adventurer could never kindle that fire in his followers which is so necessary to consolidate their mutual interests; for no one can heartily deceive numbers who is not first of all deceived himself.
