I have suspected that history, real history, is more modest and that its essential dates may be, for a long time, secret. A Chinese prose writer has observed that the unicorn, because of its own anomaly, will pass unnoticed. Our eyes see what they are accustomed to seeing.
--Jorge Luis Borges
(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.