When your opponent gives you an opening, be swift as a hare.
In the midst of chaos, there is also opportunity.
The opportunity of defeating the enemy is provided by the enemy himself.
Energy may be likened to the bending of a crossbow; decision, to the releasing of a trigger.
What is of supreme importance in war is to attack the enemy's strategy.
If, however, you are indulgent, but unable to make your authority felt; kind-hearted, but unable to enforce your commands; and incapable, moreover, of quelling disorder: then your soldiers must be likened to spoilt children; they are useless for any practical purpose.