NO MAN IS AN ISLAND - JOHN DONNE

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No man is an island entire of itself; every man 
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 any manner of thy friends or of thine 
own were; any man's death diminishes me, 
because I am involved in mankind. 
And therefore never send to know for whom 
the bell tolls; it tolls for thee. 

John Donne
Devotions upon Emergent Occasions