Here you will find the Poem Ars Poetica of poet 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