Don't know - makes you Monkey.I first discover this.For a short period of time in dont know mind I become like a monkey.cause you dont think the front or back.
Don't Know - Emptiness is a form of dont know mind.And Eagle is directly supporting it.
Don't Know - I know that Snake is supporting a kind of nothingness.So don't know mind.
I couldn't find why Tiger and the Mantis supporting Don't Know yet.I think I will find them in a short time too.
May be I should think them together.