Of all those in the army close to the commander, none is more intimate than the secret agent.
Sun TzuIf the enemy has occupied them before you, do not follow him, but retreat and try to entice him away.
Sun TzuOn dispersive ground, therefore, fight not. On facile ground, halt not. On contentious ground, attack not. On open ground, do not try to block the enemy's way. On the ground of intersecting highways, join hands with your allies. On serious ground, gather in plunder. In difficult ground, keep steadily on the march. On hemmed-in ground, resort to stratagem. On desperate ground, fight.
Sun Tzu