What is your favorite poem,??

Question:

What is your favorite poem,??

why is it your favorite, and if you dont mind how does it go???? mine is Robert Frost, In a glass of cider........it goes something like this......
It seemed i was a mite of sediment, that waited for the bottom to ferment,
so i might catch a bubble in acent,
i rode up on one till the bubble burst ,
and was then left to sink back reversed, id catch another bubble if i waited, the thing is to get now and then elated. (sorry about strange presentation and punctuation) I just like the take on life it gives me.....

Best Answer - Chosen by Asker:

upon viewing the elgin marbles by john keats.