Don't be violent, even in your words. Even while joking, don't be violent, because violence breeds more violence, anger will bring more anger, and it creates a vicious circle that has no end.
From The Book of Wisdom : Discourses on Atisha`s Seven Points of Mind Training, by Osho
Used by kind permission of Osho Foundation International
This site provides an on-line database of commentaries on the Tibetan Buddhist meditation practices of lojong (Mind Training) and tonglen.