The eighth is avihimsa, or non-violence, non-oppression; not using violent means against enemies or against anyone; not being oppressive or forcing your will unmercifully on other people.
Even high-mindedness can be oppressive, can't it? If you live with people who have very high standards and high ideals, they can push you down all the time with their ideas. It's a kind of violence, even though they might believe in non-violence and think they are not acting with violence. You can say, "I believe in avihimsa" but still be very oppressive about it. That's why we often tend to see it as hypocrisy.
When we talk about morality now, some people get very tense, because they remember morality as being oppressive, like in Victorian times when people were intimidated and frightened by moral judgments. But that is not avihimsa. Avihimsa is non-oppression.
After avihimsa is khanti, which is patience, forbearance, tolerance. To be non-oppressive and non-violent, not to follow anger, one needs to be patient. We need to bear with what is irritating, frustrating, unwanted, unloved, unbeautiful. We need to forbear rather than react violently to it, oppress it, annihilate it.
http://www.purifymind.com/PerfectSociety.htm