The Art of War - By Sun Tzu

• According as circumstances are favorable, one should modify one's plans.

• All warfare is based on deception.
  
  
• Hence, when able to attack, we must seem unable; when using our forces, we must seem inactive; when we are near, we must make the enemy believe we are far away; when far away, we must make him believe we are near.
  
  
• Hold out baits to entice the enemy. Feign disorder, and crush him.
  
  
• If he is secure at all points, be prepared for him. If he is in superior strength, evade him.
  
  
• If your opponent is of choleric temper, seek to irritate him. Pretend to be weak, that he may grow arrogant.
  
  
• If he is taking his ease, give him no rest. If his forces are united, separate them.
  
  
• Attack him where he is unprepared, appear where you are not expected.
  
  
• These military devices, leading to victory, must not be divulged beforehand.
  
  
• The clever combatant imposes his will on the enemy, but does not allow the enemy's will to be imposed on him.