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.

Martin Luther King, Jr., Strength To Love, 1963.