HERE at right of the entrance this bronze head, 
Human, superhuman, a bird's round eye, 
Everything else withered and mummy-dead. 
What great tomb-haunter sweeps the distant sky 
(Something may linger there though all else die;) 
And finds there nothing to make its tetror less 
i{Hysterica passio} of its own emptiness? 
 
No dark tomb-haunter once; her form all full 
As though with magnanimity of light, 
Yet a most gentle woman; who can tell 
Which of her forms has shown her substance right? 
Or maybe substance can be composite, 
profound McTaggart thought so, and in a breath 
A mouthful held the extreme of life and death. 
 
But even at the starting-post, all sleek and new, 
I saw the wildness in her and I thought 
A vision of terror that it must live through 
Had shattered her soul.  Propinquity had brought 
Imagiation to that pitch where it casts out 
All that is not itself:  I had grown wild 
And wandered murmuring everywhere, 'My child, my 
child! ' 
 
Or else I thought her supernatural; 
As though a sterner eye looked through her eye 
On this foul world in its decline and fall; 
On gangling stocks grown great, great stocks run dry, 
Ancestral pearls all pitched into a sty, 
Heroic reverie mocked by clown and knave, 
And wondered what was left for massacre to save.
William Butler Yeats
http://www.poemhunter.com/poem/a-bronze-head/