《孙子兵法》十三篇中,有一篇是专门论势的,叫《势篇》。在《势篇》中孙子认为:“激水之疾,至于漂石者,势也;鸷鸟之疾,至于毁折者,节也。是故善战者,其势险,其节短。势如(?)弩,节如发机。”意思是说:湍急的流水以飞快的速度奔泻,以致能使石块漂移,这是由于水势强大的缘故;凶猛的飞鸟,以飞快的速度搏击,以致能捕杀鸟兽,这是由于节奏恰当的关系。所以,高明的将帅指挥作战,他所造成的态势是险峻的,他所掌握的行动节奏是短促而猛烈的。这种态势,就像张满的弓弩;这种节奏,犹如触发弩 “Art of War” Thirteen articles, one is a special argument, called “potential chapter.” In the “story” in the grandson that: “the water of the disease, as the boulder, potential also; burglary disease, as ruin those who, too, are so good warriors, the potential danger, the short section. Such as (?) Crossbow, such as the starting point of the plane. ”The implication is that turbulent water runs at a rapid rate so as to cause the stones to drift, due to the powerful water potential; fierce birds fighting at speed, To be able to kill birds and animals, it is due to the proper pace of the relationship. Therefore, clever generals commanding operations, the situation he has created is steep, and the pace of his actions is short and violent. This situation, like a full crossbow; this rhythm, like triggering crossbow