《孙子兵法·始计篇》
用兵之道在于千变万化、出其不意。所以，明明能征善战，却向敌人装作软弱无能；本来准备用兵，却伪装不准备打仗；要攻打近处的目标，却给敌人造成攻击远处的假象；要攻打远处的目标，相反却伪装作要在近处攻击；敌人贪心就用小利来引诱他上当；敌人混乱就乘机攻取他；敌人实力雄厚就要谨慎防备；敌人强大就暂时避开其锋芒；敌人容易冲动发怒，就设法挑逗他，使其失去理智；对于小心谨慎的敌人，要千方百计骄纵他，使其丧失警惕；敌人安逸就设法骚扰他，搞得他疲劳不堪；内部团结的敌人，要设法离间他，让他分裂。
故能而示之不能，用而示之不用，近而示之远，远而示之近；利而诱之，乱而取之，实而备之，强而避之，怒而挠之，卑而骄之，逸而劳之，亲而离之。攻其无备，出其不意。
The way of using troops is to change in many ways and to be unexpected. Therefore, although clearly capable of fighting well, he pretends to be weak and incompetent to the enemy; originally preparing to use troops, but pretending not to be ready to fight; attacking a nearby target, but giving the enemy the illusion of attacking from a distance; to attack a distant target, on the contrary, pretending to attack nearby; If the enemy is greedy, use small profits to lure him into the trap; if the enemy is in chaos, take the opportunity to capture him; if the enemy is strong, be cautious and defensive; if the enemy is strong, avoid his edge for the time being; If the enemy is prone to impulsive anger, find ways to provoke him and make him lose his mind; for a cautious enemy, try every means to spoil him and make him lose his vigilance; If the enemy is at ease, find a way to harass him and make him exhausted; For the united enemy, find ways to break them up and let them split.