Darkness cannot drive out darkness: only light can do that. Hate cannot drive out hate: only love can do that.
Nonviolence is the the answer to the crucial political and moral questions of our time: the need for man to overcome oppression and violence without resorting to oppression and violence. Man must evolve for all human conflict a method that rejects revenge, aggression and retaliation. The foundation of such a method is love.
Dr. Martin Luther King, Jr.