Keep your friends close and your enemies even closer.
Too frequent rewards indicate that the general is at the end of his resources; too frequent punishments that he is in acute distress.
Concentrate your energy and hoard your strength.
Someone unfamiliar with the mountains and forests cannot advance [the team]. One who does not employ local guides cannot gain the advantage.
Know thy self, know thy enemy.
What is essential in war is victory, not prolonged operations.