" There’s a book called
“A Dictionary of Angels.”
No one has opened it in fifty years,
I know, because when I did,
The covers creaked, the pages
Crumbled. There I discovered

The angels were once as plentiful
As species of flies.
The sky at dusk
Used to be thick with them.
You had to wave both arms
Just to keep them away.

Now the sun is shining
Through the tall windows.
The library is a quiet place.
Angels and gods huddled
In dark unopened books. "

― Charles Simic , Sixty Poems