All warfare is based on deception. If your enemy is superior, evade him. If angry, irritate him. If equally matched, fight and if not: split and re-evaluate.

There is no place where espionage is not possible.

This does not mean that the enemy is to be allowed to escape. The object is to make him believe that there is a road to safety, and thus prevent his fighting with the courage of despair. After that, you may crush him.

In the midst of chaos, there is also opportunity.

To ... not prepare is the greatest of crimes; to be prepared beforehand for any contingency is the greatest of virtues.

In the midst of difficulties we are always ready to seize an advantage, we may extricate ourselves from misfortune.

To know your Enemy, you must become your Enemy.