"Hate multiplies hate, violence multiplies violence, and toughness multiplies toughness in a descending spiral of destruction."

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The ultimate weakness of violence is that it is a descending spiral, begetting the very thing it seeks to destroy. Instead of diminishing evil, it multiplies it. Through violence you may murder the liar, but you cannot murder the lie, nor establish the truth. Through violence you may murder the hater, but you do not murder hate. In fact, violence merely increases hate... Darkness cannot drive out darkness: only light can do that. Hate cannot drive out hate: only love can do that.

— Martin Luther King, Jr.