Appraise war in terms of the fundamental factors. The first of these factors is moral influence.
The greatest victory is that which requires no battle.
Pretend inferiority and encourage his arrogance.
He who wishes to fight must first count the cost. When you engage in actual fighting, if victory is long in coming, then men's weapons will grow dull and their ardor will be dampened. If you lay siege to a town, you will exhaust your strength.
The opportunity of defeating the enemy is provided by the enemy himself.
The end and aim of spying in all its five varieties is knowledge of the enemy; and this knowledge can only be derived, in the first instance, from the converted spy. Hence it is essential that the converted spy be treated with the utmost liberality.