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Rules necessary for definitions. Not to leave any terms at all obscure or ambiguous without definition; Not to employ in definitions any but terms perfectly known or already explained.

— Blaise Pascal

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More quotes by Blaise Pascal

People almost invariably arrive at their beliefs not on the basis of proof but on the basis of what they find attractive.

Christian piety annihilates the egotism of the heart; worldly politeness veils and represses it.

Men never do evil so completely and cheerfully as when they do it conscientiously.

Pensées (1669)

I would have written a shorter letter, but I did not have the time.

Force and not opinion is the queen of the world; but it is opinion that uses the force.

Pensées (1669)

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Quote text and notes from Wikiquote: Blaise Pascal (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.