"Don't manipulate those you can out think, just because you are able to."
Why?
Firstly, having a centralised command economy run by the 'bright' people in charge at the centre didn't work out particularly well for the USSR. Even if you are well intentioned and manipulating them in a direction that you think is in their best interests (which, in any case, isn't the situation the dictum was talking about), you're unlikely to manage their affairs better than they would themselves.
Secondly, fooling people can become a habit. And the easiest person to fool is yourself. What do you changes who you are, to some extent.
Thirdly, people of...
People want to tell everything instead of telling the best 15 words. They want to learn everything instead of the best 15 words. In this thread, instead post the best 15-words from a book you've read recently (or anything else). It has to stand on its own. It's not a summary, the whole value needs to be contained in those words.
I'll start in the comments below.
(Voted by the Schelling study group as the best exercise of the meeting.)