Percy Bysshe Shelley - A Lament

O World! O Life! O Time!
On whose last steps I climb,
Trembling at that where I had stood before;
When will return the glory of your prime?
No more -Oh, never more!

Out of the day and night
A joy has taken flight:
Fresh spring, and summer, and winter hoar
Move my faint heart with grief, but with delight
No more -Oh, never more!

Percy Bysshe Shelley

http://www.poemhunter.com/poem/a-lament/