The height of strategy, is to attack your opponent's strategy.
If fighting is sure to result in victory, then you must fight.
Opportunities increase as they are taken.
Hold out baits to entice the enemy. Feign disorder, and crush him.
A wise general makes a point of foraging of the enemy.
Hostile armies may face each other for years, striving for the victory which is decided in a single day. This being so, to remain in ignorance of the enemy's condition simply because one grudges the outlay of a hundred ounces of silver in honors and emoluments, is the height of inhumanity.