In the game "Alpha Protocol", one of the characters is a conspiracy theorist. When he sends you an email about the Federal Reserve (which, according to him, is deliberately engineering a financial crisis so the banks can foreclose on all the houses and get everyone's property), you can respond by quoting Time Cube at him. Which makes him like you more.
This is our monthly thread for collecting these little gems and pearls of wisdom, rationality-related quotes you've seen recently, or had stored in your quotesfile for ages, and which might be handy to link to in one of our discussions.