"The ultimate weakness of violence is that it is a descending spiral, begetting the very thing it seeks to destroy. ... In fact, violence merely increases hate. ... Returning violence for violence multiplies violence, adding deeper darkness to a night already devoid of stars."
Source : B.K.S. Iyengar, John J. Evans, Douglas Abrams (2006). “Light on Life: The Yoga Journey to Wholeness, Inner Peace, and Ultimate Freedom”, p.43, Rodale