If not in the interests of the state, do not act. If you cannot succeed, do not use troops. If you are not in danger, do not fight.
In the midst of chaos, there is also opportunity.
Thus the expert in battle moves the enemy, and is not moved by him.
Keep your friends close and your enemies even closer.
All men can see these tactics whereby I conquer, but what none can see is the strategy out of which victory is evolved.
Rewards for good service should not be deferred a single day.