If a battle can not be won do not fight it.
When the thunderclap comes, there is no time to cover the ears.
There is no instance of a nation benefiting from prolonged warfare.
Subjugating the enemy's army without fighting is the true pinnacle of excellence.
In desperate position, you must fight.
Those who are victorious plan effectively and change decisively. They are like a great river that maintains its course but adjusts its flow.