Self-Portrait in the mirror

We can see the outside world through the glass 
panes of a window but when we stand before 
a Mirror we see only ourselves and nothing else.
 Both the mirror and the panes are glasses but 
mirror has a coating at the backside. 
This coating blocks our vision. The coating 
of arrogance makes us so self centred, that 
we can see nothing except ourselves. 
Even a little of arrogance, even a thin 
coating would result in only a 
Self-Portrait in the mirror.