In honor of Halloween, a Yeats poem

In honor of Halloween, here is a poem from William Butler Yeats, my favorite poet:

The Cat and the Moon

THE CAT went here and there
And the moon spun round like a top,
And the nearest kin of the moon
The creeping cat looked up.
Black Minnaloushe stared at the moon,
For wander and wail as he would
The pure cold light in the sky
Troubled his animal blood.
Minnaloushe runs in the grass,
Lifting his delicate feet.
Do you dance, Minnaloushe, do you dance?
When two close kindred meet
What better than call a dance?
Maybe the moon may learn,
Tired of that courtly fashion,
A new dance turn.
Minnaloushe creeps through the grass
From moonlit place to place,
The sacred moon overhead
Has taken a new phase.
Does Minnaloushe know that his pupils
Will pass from change to change,
And that from round to crescent,
From crescent to round they range?
Minnaloushe creeps through the grass
Alone, important and wise,
And lifts to the changing moon
His changing eyes.