A kingdom that has once been destroyed can never come again into being; nor can the dead ever be brought back to life.
Sun TzuUnless you know the mountains and the forests, the defiles and impasses, the lay of the marshes and swamps, you cannot maneuver with an armed force. Unless you use local guides, you cannot get the advantages of the land.
Sun TzuOf all those in the army close to the commander, none is more intimate than the secret agent.
Sun TzuBy altering his arrangements and changing his plans, the skillful general keeps the enemy without definite knowledge. By shifting his camp and taking circuitous routes, he prevents the enemy from anticipating his purpose. At the critical moment, the leader of an army acts like one who has climbed up a height and then kicks away the ladder behind him.
Sun Tzu