There has never been a protracted war from which a country has benefitted.

To perceive victory when it is known to all is not really skilful. Everyone calls victory in battle good, but it is not really good.

To a surrounded enemy, you must leave a way of escape.

Keep your friends close and your enemies even closer.

When you know both yourself as well as your competition, you are never in danger. To know yourself and not others, gives you half a chance of winning. Knowing neither yourself or your competition puts you in a position to lose.

With regard to precipitous heights, if you are beforehand with your adversary, you should occupy the raised and sunny spots, and there wait for him to come up.

Who does not know the evils of war cannot appreciate its benefits.