True, but I had the feeling that some readers here would like it anyway. (I view this as more of a "quotes LW readers would like" thread than a literal "rationality quotes" thread.)
Also, it does fit into the joy in the merely real ethos, which in turn makes it emotionally easier to accept rationalism and reductionism.
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.