from The Circus Animal's Desertion

I sought a theme and sought for it in vainI sought it daily for six weeks or so.
Maybe at last, being but a broken man,
I must be satisfied with my heart, although
Winter and summer till old age began
My circus animals were all on show,
Those stilted boys, that burnished chariot,
Lion and woman and the Lord knows what.
What can I but enumerate old themes,
First that sea-rider Oisin led by the nose
Through three enchanted islands, allegorical dreams,
Vain gaiety, vain battle, vain repose,
Themes of the embittered heart, or so it seems,
That might adorn old songs or courtly shows...

- William Butler Yeats