Adrienne Rich

Boundary

What has happened here will do

To bite the living world in two,

Half for me and half for you.

Here at least I fix a line

Severing the world’s design

Too small to hold both yours and mine.

There’s enormity in a hair

Enough to lead men not to share

Narrow confines of a sphere

But put an ocean or a fence

Between two opposite intents.

A hair would span the difference.

Adrienne Rich. Selected Poems. London:  The Hogarth Press,  1967.