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
I think it is a part of my heart. But it flickers.
Faces and darkness separate us over and over.
Now I am a lake. A woman bends over me,
Searching my reaches for what she really is.
Then she turns to those liars, the candles or the moon.
I see her back, and reflect it faithfully.
She rewards me with tears and an agitation of hands.
I am important to her. She comes and goes.
Each morning it is her face that replaces the darkness.
Candlelight and moonlight are both romanticized light sources, soft and flattering. 
 The speaker is suggesting that the candles and the moon do not provide true light, therefore the mirror distorts the image reflecting back. They are personified as “liars” because they do not allow the truthful image to be shown.
Mirror