Polemic—persuasive writing—only works when it doesn't feel like propaganda. The audience must feel that you're being absolutely fair to people on the other side.
-- Orson Scott Card, "Characters and Viewpoint"
Unfortunately, some audiences have rather interesting ideas about what passes for fairness to the other side.
(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.