Because I am idolotrous and have besought 
With grievous supplication and consuming prayer, 
The admirable image that my love has wrought 
Out of her swan's neck and her dark, abundant hair: 
The jealous gods who brook no worship save their own, 
Turned my live idol marble and her heart to stone.
Ernest Christopher Dowson
http://www.poemhunter.com/poem/epigram/