I am silver and exact. I have no preconceptions.
Whatever you see I swallow immediately
Just as it is, unmisted by love or dislike.
I am not cruel, only truthful---
The eye of a little god, four-cornered.
Most of the time I meditate on the opposite wall.
It is pink, with speckles. I have looked at it so long
The mirror is saying that it will never lie. Nothing the mirror says is personal and everything it will say is what the person looking in already knows. 
 The dash shortens the line and creates a  caesura . The poet is definite and wants no debate.
Mirror