John Ashbery, "The Grapevine"

Of who we and all they are
You all now know. But you know
After they began to find us out we grew
Before they died thinking us the causes

Of their acts. Now we'll not know
The truth of some still at the piano, though
They often date from us, causing
These changes we think we are. We don't care

Though, so tall up there
In young air. But things get darker as we move
To ask them: Whom must we get to know
To die, so you live and we know?