This is my first time seeing this quote and it is a good one. Took me a minute to realize what he was saying. And I've been hanging out on this site for years.
I can't stop you from saying or thinking I should have noticed the quote before, if that's the way your mind works. But in reality I am not unique and I am not an idiot and if I find something particularly useful here there is likely a significant minority of the rest of the readers who find it useful. Which is sort of consistent with the quote.
Another month, another rationality quotes thread. The rules are: