叶芝的《当你老了》的全文如下：
```
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
Your 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.
```
这首诗是威廉·巴特勒·叶芝于1893年创作，献给他的女友茅德·冈，是一首表达热烈而真挚爱情情感的诗篇
