When you do battle, even if you are winning, if you continue for a long time it will dull your forces and blunt you edge...If you keep your armies out in the field for a long time, your supplies will be insufficient. Transportation of provisions itself consumes 20 times the amount transported.
Sun TzuDo not swallow bait offered by the enemy. Do not interfere with an army that is returning home.
Sun TzuThe ultimate in disposing one's troops is to be without ascertainable shape. Then the most penetrating spies cannot pry in nor can the wise lay plans against you.
Sun TzuNo ruler should put troops into the field merely to gratify his own spleen; no general should fight a battle simply out of pique.
Sun TzuIf I determine the enemy's disposition of forces while I have no perceptible form, I can concentrate my forces while the enemy is fragmented. The pinnacle of military deployment approaches the formless: if it is formless, then even the deepest spy cannot discern it nor the wise make plans against it.
Sun Tzu