Provided a man is not mad, he can be cured of any folly but vanity; there is no cure for this but experience, if indeed there is any cure for it at all
 Jean-Jacques Rousseau, Emile, or On Education (1762). copy citation

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Author Jean-Jacques Rousseau
Source Emile, or On Education
Topic experience vanity cure
Date 1762
Language English
Reference
Note Translated by Barbara Foxley
Weblink http://www.gutenberg.org/cache/epub/5427/pg5427-images.html

Context

“If, therefore, as a result of my care, Emile prefers his way of living, seeing, and feeling to that of others, he is right; but if he thinks because of this that he is nobler and better born than they, he is wrong; he is deceiving himself; he must be undeceived, or rather let us prevent the mistake, lest it be too late to correct it.
Provided a man is not mad, he can be cured of any folly but vanity; there is no cure for this but experience, if indeed there is any cure for it at all; when it first appears we can at least prevent its further growth. But do not on this account waste your breath on empty arguments to prove to the youth that he is like other men and subject to the same weaknesses. Make him feel it or he will never know it. This is another instance of an exception to my own rules; I must voluntarily expose my pupil to every accident which may convince him that he is no wiser than we.” source
Original quote

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