There is no place where espionage is not possible.
Winning Strategists are certain of triumph before seeking a challenge. Losing Strategists are certain to challenge before seeking a triumph.
Who does not know the evils of war cannot appreciate its benefits.
If those who are sent to draw water begin by drinking themselves, the army is suffering from thirst.
Invincibility lies in the defense; the possibility of victory in the attack.
Swift as the wind. Quiet as the forest. Conquer like the fire. Steady as the mountain