Once we get out of the instinctive mindset of meeting force with like force, we can see that the objective is to render an enemy ineffective by depriving him of resources, morale, support and motivation. When we attack his plan, we strike at the core of his belief that he can prevail.

My take on the last bit is that I don’t believe it is possible to know your enemy and not know your self. Our enemies are defined by who we are. If you are that vapid and devoid of self knowledge, you do not have enemies. Enmity requires sentience – and what you are left with is a simple predator/prey relationship.