師 Shi

Discussion:
During war times, government and army has to be united as a system to ensure a chance for victory.
The reason for war has to be a righteous one.
A leader has to have foresight and be agile in the use of strategy according to the situation.
〈師〉卦的內容是在描述戰爭理論。卦辭表明,政治因素和軍事因素的統一,決定著戰爭的勝負。
依據《彖傳》和交辭的闡述,政治因素是指戰爭的性質是否屬於正義。在《易經》編定的時代,國家沒有職業性的常備軍,而是寓兵於民,兵民合一。
戰爭勝負,直接關係到百姓是否擁護-以及戰爭過程中有沒有足夠的可戰之兵。
至於軍事因素,〈師〉卦講得更多。首先重視統帥的選擇,認為前線統帥要有威望,指揮權千萬不能旁落。其次是紀律嚴明,失律就等於失敗.,戰術要隨機應變,靈活運用。