O Presences

"O Presences,
That passion, piety or affection knows,
And that all heavenly glory symbolise -
O self born mockers of man's enterprise.

Labour is blossoming or dancing where
The body is not bruised to pleasure soul,
Nor beauty born out of its own despair,
Nor blear-eyed wisdom out of midnight oil.
O chestnut tree, great-rooted blossomer,
Are you the leaf, the blossom, or the bole?
O body swayed to music, O brightening glance,
How can we know the dancer from the dance?"

Yeats, 'Among School Children'