He who wishes to fight must first count the cost
All battles are won before they start.
All war is deception.
He who is not sage and wise, humane and just, cannot use secret agent.s. And he who is not delicate and subtle cannot get the truth out of them.
If the mind is willing, the flesh could go on and on without many things.
When one treats people with benevolence, justice and righteousness, and reposes confidence in them, the army will be united in mind and all will be happy to serve their leaders.