THROUGH winter-time we call on spring,
And through the spring on summer call,
And when abounding hedges ring
Declare that winter's best of all;
And after that there s nothing good
Because the spring-time has not come --
Nor know that what disturbs our blood
Is but its longing for the tomb.

William Butler Yeats

http://www.poemhunter.com/poem/the-wheel/