Ahimsa: non-violence, non-injury, harmlessness
In his commentary on the Yoga Sutras, Vyasa [Vyasa was one of the greatest sages of India, author of the Mahabharata (which includes the Bhagavad Gita), the Brahma Sutras, and the codifier of the Vedas.] begins his exposition of ahimsa: "Ahimsa means in no way and at no time to do injury to any living being." Shankara expands on this, saying that ahimsa is "in no capacity and in no fashion to give injury to any being." This would include injury by word or thought as well as the obvious injury perpetrated by deed, for Shankara further says: "Ahimsa is to be practiced in every capacity-body, speech, and mind." We find this principle being set forth by Jesus in his claim that anger directed toward someone is a form of murder (Matthew 5:21,22), and by the Beloved Disciple’s statement that hatred is also murder.(I John 3:15)
Even a simple understanding of the law of karma, the law of sowing and reaping (Galatians 6:7), enables us to realize the terrible consequences of murder for the murderer. As Vyasa explains: "The killer deprives the victim of spirit, hurts him...