John Donne

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 friend’s
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.