For whom the bell tolls a poem

For whom the bell tolls a poem
(No man is an island) by John Donne

No man is an island,
Entire of itself.
Each is a piece of the continent,
A part of the main.
If a clod be washed away by the sea,
Europe is the less.
As well as if a promontory were.
As well as if a manor of thine own
Or of thine friend's were.
Each man's death diminishes me,
For I am involved in mankind.
Therefore, send not to know
For whom the bell tolls,
It tolls for thee.

These famous words by John Donne were not originally written as a poem - the passage is taken from the 1624 Meditation 17, from Devotions Upon Emergent Occasions and is prose. The words of the original passage are as follows:

John Donne
Meditation 17
Devotions upon Emergent Occasions

"No man is an iland, intire of it selfe; every man is a peece of the Continent, a part of the maine; if a clod bee washed away by the Sea, Europe is the lesse, as well as if a Promontorie were, as well as if a Mannor of thy friends or of thine owne were; any mans death diminishes me, because I am involved in Mankinde; And therefore never send to know for whom the bell tolls; It tolls for thee...." 

And then there is the wiki link to the book by Ernest Hemingway:  http://en.wikipedia.org/wiki/For_Whom_the_Bell_Tolls

And there are many other links on this phrase.