Edna St. Vincent Millay

She had forgotten how the August night
Was level as a lake beneath the moon,
In which she swam a little, losing sight
Of shore; and how the boy, who was at noon
Simple enough, not different from the rest,
Wore now a pleasant mystery as he went,
Which seemed to her an honest enough test
Whether she loved him, and she was content.
So loud, so loud the million crickets' choir . . .
So sweet the night, so long-drawn-out late . . .
And if the man were not her spirit's mate,
Why was her body sluggish with desire?
Stark on the open field the moonlight fell,
But the oak tree's shadow was deep and black and secret as a well.