求：著名的英文爱情诗？谢谢！

When you are old and grey and full of sleep
And nodding by the fire,take down this book
And slowly read ,and dream of the soft look
Yours eyes had once,and of their shadows deep.

How many loved your moments of glad grace,
And loved your beauty with love false or true,
But one man loved the pilgrim soul in you,
And loved the sorrows of your changing face;

And bending down beside the glowing bars,
Murmur,a little sadly,how love fled
And paced upon the mountains overhead.
And hid his face amid a crowd of stars .
这就是幸福像花儿一样里面那个谁给人女孩写的诗里面抄的。叶芝<When you are old>