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.
Perhaps a bit dramatic, but wow, what powerful words to live by!