"Darkness cannot drive out darkness; only light can do that.
Hate cannot drive out hate; only love can do that.
Hate multiplies hate, violence multiplies violence,
and toughness multiplies toughness
in a descending spiral of destruction...
The chain reaction of evil --
hate begetting hate, wars producing more wars --
must be broken, or we shall be plunged
into the darkness of annihilation."
-Martin Luther King, Jr