Get beyond love and grief: exist for the good of Man.
When you attack the enemy, your spirit must go to the extent of pulling the stakes out of a wall and using them as spears and halberds.
from one thing, know ten thousand things
It is imperative to master the principles of the art of war and learn to be unmoved in mind even in the heat of the battle.
Accept everything just the way it is.
The Way of the warrior does not include other ways, such as Confucianism, Buddhism, certain traditions, artistic accomplishments, and dancing. But even though these are not part of the Way, if you know the Way broadly, you will see it in everything.