Only light drives out darkness

"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 murder the hater,
but you do not murder hate.
In fact, violence merely increases hate...
Returning violence for violence multiplies violence,
adding deeper darkness to a night already devoid of stars.
Darkness cannot drive out darkness; only light can do that.
Hate cannot drive out hate: Only love can do that."

-Martin Luther King, Jr.