The Crack
--Denise Levertov 

While snow fell carelessly
floating indifferent in eddies of
rooftop air, circling the black
chimney-cowls, 

a spring night entered
my mind through the tight-closed window,
wearing 

a loose Russian shirt of
light silk.
...............For this, then,
that slanting
line was left, that crack, the pane
never replaced.