Marshall B. Rosenberg said this quote

Peace requires something far more difficult than revenge or merely turning the other cheek; it requires empathizing with the fears and unmet needs that provide the impetus for people to attack each other. Being aware of these feelings and needs, people lose their desire to attack back because they can see the human ignorance leading to these attacks; instead, their goal becomes providing the empathic connection and education that will enable them to transcend their violence and engage in cooperative relationships.

~ Marshall B. Rosenberg

All violence is the result of people tricking themselves into believing that their pain derives from other people and that consequently those people deserve to be punished.

~ Marshall B. Rosenberg