Earth in beauty dressed
Awaits returning spring.
All true love must die,
Alter at the best
Into some lesser thing.
Prove that I lie.
Such body lovers have,
Such exacting breath,
That they touch or sigh.
Every touch they give,
Love is nearer death.
Prove that I lie.
William Butler Yeats
http://www.poemhunter.com/poem/her-anxiety/