No Fear, No Hesitation, No Surprise, No Doubt
Know your enemy, know his sword.
Do not act following customary beliefs.
All things entail rising and falling timing. You must be able to discern this.
In strategy your spiritual bearing must not be any different from normal. Both in fighting and in everyday life you should be determined though calm. Meet the situation without tenseness yet not recklessly, your spirit settled yet unbiased.
Unless you really understand others, you can hardly attain your own self-understanding.