A puzzling, often paradoxical statement or story, used in Zen Buddhism as an aid to meditation and a means of gaining spiritual awakening.
A koan is a riddle that isn't intended to be solved. Or at least you aren't supposed to come up with a literal solution. They are used to dope slap you out of your comfort zone and look at things differently. The answer to a koan should therefore be intangible.
Literal people aren't very good at responding to a koan. Ask them what the sound of one hand clapping is and they are likely to say, "Nothing, one hand can't clap." You response should be to immediately smack them across the face and say, "But one hand can slap."
This will probably piss them off, but teaching people how to look at things differently sometimes hurts.
Sometimes I like to approach blogging like a zen koan. It is an opportunity to write, illustrate or compose a thought without relying on traditional structure. And I'll be damned if it isn't a little like meditation for me.
Or maybe it's like a box of chocolates. I sometimes get those things mixed up.
I think this is where I say that is all I have to say about that.