Ahimsa: Respect for all living things and avoidance of violence towards others.

Gandhi participated in war as medical support. He raised and organized 1,100 volunteers to serve in the Natal Indian Ambulance Corps.

"As soon as the news reached South Africa that I along with other Indians had offered my services in the war, I received two cables. One of these was from Mr. Polak who questioned the consistency of my action with my profession of ahimsa. I had to a certain extent anticipated this objection, for I had discussed the question in my Hind Swaraj or Indian Home Rule, and used to discuss it day in and day out with friends in South Africa. All of us recognized the immorality of war. If I was not prepared to prosecute my assailant, much less should I be willing to participate in a war, especially when I knew nothing of the justice or otherwise of the cause of the combatants. Friends of course knew that I had previously served in the Boer War, but they assumed that my views had since undergone a change.

As a matter of fact the very same line of argument that persuaded me to take part in the Boer War had weighed with me on this occasion. It was quite clear to me that participation in war could never be consistent with ahimsa. But it is not always given to one to be equally clear about one's duty. A votary [a devoted follower, adherent, or advocate of someone or something] of truth is often obliged to grope in the dark.

Ahimsa is a comprehensive principle. We are helpless mortals caught in the conflagration of himsa [to injure or harm]. The saying that life lives on life has a deep meaning in it. Man cannot for a moment live without consciously or unconsciously committing outward himsa. The fact of his living — eating, drinking and moving about — necessarily involves some himsa, destruction of life, be it ever so minute. A votary of ahimsa therefore remains true to his faith if the spring of all his actions is compassion, if he shuns to the best of his ability the destruction of the tiniest creature, tries to save it, and thus incessantly strives to be free from the deadly coil of himsa. He will be constantly growing in self-restraint and compassion, but he can never become entirely free from outward himsa.

Then again, because underlying ahimsa is the unity of all life, the error of one cannot but affect all, and hence man cannot be wholly free from himsa. So long as he continues to be a social being, he cannot but participate in the himsa that the very existence of society involves. When two nations are fighting, the duty of a votary ahimsa is to stop the war. He who is not equal to that duty, he who has no power of resisting war, he who is not qualified to resist war, may take part in war, and yet wholeheartedly try to free himself, his nation and the world from war." - Mahatma Gandhi, The Story of My Experiments With Truth, Part Four, Chapter Thirty-Nine, "A Spiritual Dilemma"