Pretend inferiority and encourage his arrogance.

Of all those in the army close to the commander, none is more intimate than the secret agent.

If those who are sent to draw water begin by drinking themselves, the army is suffering from thirst.

If you are strong, appear weak. But if you are weak, appear strong.

If words of command are not clear and distinct, if orders are not thoroughly understood, the general is to blame. But if his orders are clear, and the soldiers nevertheless disobey, then it is the fault of their officers.

There has never been a protracted war from which a country has benefitted.

Agitate him and ascertain the pattern of his movement.