Ars Poetica

by Archibald MacLeish

A poem should be palpable and mute
As a globed fruit,

Dumb
As old medallions to the thumb,

Silent as the sleeve-worn stone
Of casement ledges where the moss has grown—

A poem should be wordless
As the flight of birds.

                 *

A poem should be motionless in time 
As the moon climbs,

Leaving, as the moon releases
Twig by twig the night-entangled trees,

Leaving, as the moon behind the winter leaves, 
Memory by memory the mind—

A poem should be motionless in time 
As the moon climbs.

                  *

A poem should be equal to:
Not true.

For all the history of grief
An empty doorway and a maple leaf.

For love
The leaning grasses and two lights above the sea—

A poem should not mean
But be.

Found here on Poets.org