A monthly thread for posting rationality-related quotes you've seen recently (or had stored in your quotesfile for ages).

• Please post all quotes separately, so that they can be voted up/down separately. (If they are strongly related, reply to your own comments. If strongly ordered, then go ahead and post them together.)
• Do not quote yourself.
• Do not quote comments/posts on LW/OB.
• No more than 5 quotes per person per monthly thread, please.