"I have only made this letter longer because I have not had the time to make it shorter."

(Letter 16, 1657)

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

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All men seek happiness. This is without exception. Whatever different means they employ, they all tend to this end. The cause of some going to war, and of others avoiding it, is the same desire in both, attended with different views. The will never takes the least step but to this object. This is the motive of every action of every man, even of those who hang themselves.