No man is an island, entire of itself; everyman is a piece of the continent, a part of the main; if a cold 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 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, Meditation XVII