2. 故經之以五，校之以計，而索其情：
一曰道，二曰天，三曰地，四曰將，五曰法。
然而在戰場上要遵循五項規則，擬定戰術計劃時必須時時加以校正，面對新的戰況必須透過深思熟慮隨機應變，這五項規則包括：
一是道，二是天，三是地，四是將，五是法。
However, there are five rules to follow in the battlefield, keep updating when determine tactics, keep correcting with deliberation when face new conditions. These five rules are:
(1) Morality
(2) Heaven
(3) Earth
(4) Commander
(5) Law
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