A poem should be palpable and muteAs a globed fruitDumbAs old medallions to the thumbSilent as the sleeve-worn stoneOf casement ledges where the moss has grown -A poem should be wordlessAs the flight of birdsA poem should be motionless in timeAs the moon climbsLeaving, as the moon releasesTwig 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 timeAs the moon climbsA poem should be equal to:Not trueFor all the history of griefAn empty doorway and a maple leafFor loveThe leaning grasses and two lights above the sea -A poem should not meanBut be

Archibald MacLeish – Ars Poetica