Stop and consider! life is but a day;
A fragile dew-drop on its perilous way
From a tree’s summit; a poor Indian’s sleep
While his boat hastens to the monstrous steep
Of Montmorenci. Why so sad a moan?
Life is the rose’s hope while yet unblown;
The reading of an ever-changing tale;
The light uplifting of a maiden’s veil;
A pigeon tumbling in clear summer air;
A laughing school-boy, without grief or care,
Riding the springy branches of an elm.
John Keats, from Sleep and Poetry
PS: Mouse over the image and check out the link.