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Do not quote yourself.
Do not quote comments/posts on LW/OB.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.
I imagine it is from one of his books but I came across it in the introduction to The God Delusion by Richard Dawkins. Oddly enough the Hitchhiker series is absolutely full of satirical quotes which can be applied to rationality.
You all know the rules: