To discover the truth amidst our own prejudices and those of the authors is too hard a task.
 Jean-Jacques Rousseau, Emile, or On Education (1762). copy citation

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

Context

“You must have a close acquaintance with the middle classes of that great city, you must have lived among them, before you can believe that people could be at once so witty and so stupid. The strangest thing about it is that probably every one of them has read a dozen times a description of the country whose inhabitants inspire him with such wonder.
To discover the truth amidst our own prejudices and those of the authors is too hard a task. I have been reading books of travels all my life, but I never found two that gave me the same idea of the same nation. On comparing my own scanty observations with what I have read, I have decided to abandon the travellers and I regret the time wasted in trying to learn from their books; for I am quite convinced that for that sort of study, seeing not reading is required.” source