“非利不動，非得不用，非危不戰。主不可以怒而興師，將不可以慍而致戰；合于利而動，不合于利而止。怒可以復喜，慍可以復悅，亡國不可以復存，死者不可以復生。故明君慎之，良將警之，此安國全軍之道也。”

Context

Move not unless you see an advantage; use not your troops unless there is something to be gained; fight not unless the position is critical. No ruler should put troops into the field merely to gratify his own spleen; no general should fight a battle simply out of pique. If it is to your advantage, m