Where Is My (Master)Mind?

If you've been around here a little while, you've probably heard me use the word "mastermind" once or twice in reference to creative groups I've been a part of in the past, but what is it really?  Napoleon Hill introduced us to the notion with his 1925 book, The Law of Success, and to me, is best described on Wikipedia (I know, I know...) as "a peer-to-peer mentoring group used to help members solve their problems with input and advice from the other group members."  We could sit here and inject prettier words, and try to spice it up a bit, but that description really gets to the meat of it without wasting any time.  Although, I do find Hill's detail a bit too romantic not to include:  

No two minds ever come together without thereby creating a third, invisible intangible force, which may be likened to a third mind. 

The Word & The World

How old were you when you learned the word compersion?  Oh this is wild, spell-check didn't even recognize it just now.  Back to the topic at hand, how old were you?  Are you learning it right now?  Let me tell you, I was thirty-eight years old before I'd ever even heard it, let alone learned what it was.  If this is your first time seeing it, without look it up, what do you think it means?  Some of you word nerds out there are probably able to put it together, but I would have never guessed.