He who only sees what really exists and only values what he knows, rarely becomes angry.
 Jean-Jacques Rousseau, Emile, or On Education (1762). copy citation

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

Context

“but he will know beforehand how to avoid the illusion of passions before they arise, and seeing how in all ages they have blinded men's eyes, he will be forewarned of the way in which they may one day blind his own should he abandon himself to them. [Footnote: It is always prejudice which stirs up passion in our heart. He who only sees what really exists and only values what he knows, rarely becomes angry. The errors of our judgment produce the warmth of our desires.] These lessons, I know, are unsuited to him, perhaps at need they may prove scanty and ill-timed; but remember they are not the lessons I wished to draw from this study.” source