故兵闻拙速，未睹巧之久也。
If you exposed a war too long, even you are ingenious, you will make a mistake. leave a little to your opponent.
力屈，财襌（殚），中原内需于家，百姓之费，十去其七
Waging a war, you need to forage on your enemy.
故杀敌者, 怒也;取敌之利者, 货也 Kill your enemy from the power generated by your anger, get benefits from your foe.