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 if a manor 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