William Butler Yeats - Two Years Later

HAS no one said those daring
Kind eyes should be more learn'd?
Or warned you how despairing
The moths are when they are burned?
I could have warned you; but you are young,
So we speak a different tongue.
O you will take whatever's offered
And dream that all the world's a friend,
Suffer as your mother suffered,
Be as broken in the end.
But I am old and you are young,
And I speak a barbarous tongue.

William Butler Yeats

http://www.poemhunter.com/poem/two-years-later/