Ashamed of the many frailties ...

Ashamed of the many frailties they feel within, all men endeavor to hide themselves, their ugly nakedness, from each other, and wrapping up the true motives of their hearts in the specious cloak of sociableness, and their concern for the public good, they are in hopes of concealing their filthy appetites and the deformity of their desires.
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 Bernard de Mandeville

Quotes from the same author

They that examine into the Nature of Man, abstract from Art and Education, may observe, that what renders him a Sociable Animal, consists not in his desire of Company, Good-nature, Pity, Affability, and other Graces of a fair Outside; but that his vilest and most hateful Qualities are the most necessary Accomplishments to fit him for the largest, and, according to the World, the happiest and most flourishing Societies.
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 Bernard de Mandeville
The multitude will hardly believe the excessive force of education, and in the difference of modesty between men and women, ascribe that to nature, which is altogether owing to early instruction: Miss is scarce three years old, but she's spoke to every day to hide her leg, and rebuked in good earnest if she shows it; whilst little Master at the same age is bid to take up his coats, and piss like a man.
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 Bernard de Mandeville
If laying aside all worldly Greatness and Vain-Glory, I should be ask'd where I thought it was most probable that Men might enjoy true Happiness, I would prefer a small peaceable Society, in which Men, neither envy'd nor esteem'd by Neighbours, should be contented to live upon the Natural Product of the Spot they inhabit, to a vast Multitude abounding in Wealth and Power, that should always be conquering others by their Arms Abroad, and debauching themselves by Foreign Luxury at Home.
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 Bernard de Mandeville
Because impudence is a vice, it does not follow that modesty is a virtue; it is built upon shame, a passion in our nature, and may be either good or bad according to the actions performed from that motive.
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 Bernard de Mandeville