Answer:
What I am filled, I can point the way. When I am empty. Nothing moves me. I have two skins. One without and one within.
Bury deep, Pile on stones, My mind will always Dig up them bones
I cut through evil like a double edged sword, and chaos flees at my approach. Balance I single-handedly upraise, through battles fought with heart and mind, instead of with my gaze.
What goes through a door but never goes in. And never comes out?
It is worldwide, but once only a spider could weave one
What covers its face with its hands, speaks no language, yet most known what it's saying?