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 dark abyss of annihilation.
Dr. Martin Luther King, Jr.
Strength To Love, 1963