In contests of strategy it is bad to be led about by the enemy. You must always be able to lead the enemy about.
It may seem difficult at first, but everything is difficult at first.
You should not have a favourite weapon. To become over-familiar with one weapon is as much a fault as not knowing it sufficiently well.
You may abandon your own body but you must preserve your honour.
Too much is the same as not enough.
If you fail to take advantage of your enemies' collapse, they may recover.