Edna St. Vincent Millay - Sonnet 06: Bluebeard

This door you might not open, and you did;
So enter now, and see for what slight thing
You are betrayed.... Here is no treasure hid
No cauldron, no clear crystal mirroring
The sought-for truth, no heads of women slain
For greed like yours, no writhings of distress
But only what you see.... Look yet again—
An empty room, cobwebbed and comfortless
Yet this alone out of my life I kept
Unto myself, lest any know me quite;
And you did so profane me when you crept
Unto the threshold of this room to-night
That I must never more behold your face.
This now is yours. I seek another place.

Edna St. Vincent Millay

http://www.poemhunter.com/poem/sonnet-06-bluebeard/