(Since there didn't seem to be one for this month, and I just ran across a nice quote.)
A monthly thread for posting any interesting rationality-related quotes you've seen recently on the Internet, or had stored in your quotesfile for ages.
- Please post all quotes separately (so that they can be voted up (or down) separately) unless they are strongly related/ordered.
- Do not quote yourself.
- Do not quote comments/posts on LW/OB - if we do this, there should be a separate thread for it.
- No more than 5 quotes per person per monthly thread, please.
"The seeker after the truth is not one who studies the writings of the ancients and, following his natural disposition, puts his trust in them, but rather the one who suspects his faith in them and questions what he gathers from them, the one who submits to argument and demonstration, and not to the sayings of a human being whose nature is fraught with all kinds of imperfection and deficiency. Thus the duty of the man who investigates the writings of scientists, if learning the truth is his goal, is to make himself an enemy of all that he reads, and, applying his mind to the core and margins of its content, attack it from every side. He should also suspect himself as he performs his critical examination of it, so that he may avoid falling into either prejudice or leniency."
-- Alhazen (Abū 'Alī al-Hasan ibn al-Hasan ibn al-Haitham)
...voted up for the beauty with which the interpretation of this particular quote, depends on knowing the time in which it was written.