“He who seeks a pretext for his actions will always be able to find it.”

(Zweig, Stefan. The Right to Heresy: Castellio against Calvin. Boston: The Beacon Press, 1951, 81)

“Calvin’s defamatory pamphlet may be regarded as one of the most notable examples of the way in which partisan rancor can debase a man of outstanding intelligence and literary mastership. It can also serve as a warning to statesmen, showing them how foolishly they may behave when they fail to bridle their emotions.”

(Zweig, Stefan. The Right to Heresy: Castellio against Calvin. Boston: The Beacon Press, 1951, 197)

“Persons who are ruthless in the attempt to suppress the opinions of others are extremely sensitive to contradiction.”

(Zweig, Stefan. The Right to Heresy: Castellio against Calvin. Boston: The Beacon Press, 1951, 165)

Since the world began, multifarious disasters have been the work of doctrinaires who intolerantly maintained their own opinions to be the only sound ones. It is these fanatics for the unification of thoughts and actions in accordance with their own model who, by self-glorication and contentiousness, trouble the peace of the world, transforming the natural juxtaposition of ideas into opposition and murderous disputes.”

(Zweig, Stefan. The Right to Heresy: Castellio against Calvin. Boston: The Beacon Press, 1951, 176)