Virtue of Non-Injury Should Not be Taken to an Extreme
The virtue of non-injury should not be taken to an fanatical level. In life, you have to balance a pair of opposites; otherwise, there will be chaos. Kindness and non-injury, for instance, has to be balanced with order and severity. If a person has a bacterial infection, he has no choice but to take antibiotics in order to kill the germs and stop the infection. If criminals were allowed to roam the city, the lives of other citizens may be endangered. That is why the state has to isolate them in prisons. It is simply a matter of peace and order.
Although non-injury is the ultimate defense, it does not mean that you are not allowed to use force. If you use force, however, it will be for a higher purpose -- to protect yourself, other people, and society, or to impart certain lessons.
A certain young man once asked a teacher, "If parents physically discipline their children, is this not a form of violence?" The teacher replied, "If parents do not discipline their children, they will be come a liability for the family and to society when they grow up. They will be come unruly and irresponsible. So which is more injurious -- disciplining or not disciplining children?"
If using force, one has to consider the right time to use force, the right kind of force and the right amount of force. In its truest esoteric sense, the mastery of non-injury is the mastery of power. In particular, it is the mastery of extreme patience and the non-excessive use of power!
--Pg 106, Practical psychic Self-Defense for Home and Office, Master Choa Kok Sui
I wish that the disciplinary paragraph was written a little differently so that it is not so easily taken out of context.