It is key to know and understand your mind. How your reality is created and how your actions and reactions work, how you defend your own unconscious behaviour and how your belief system locks you inside a box.
This film is great, it is actually two films; the first one is about your mind and the second about quantum physics..
I am posting it mainly for the first film, however the second is interesting too.
oh, and thanks to Sarah for showing this to me.