The military has no constant form, just as water has no constant shape - adapt as you face the enemy, without letting them know beforehand what you are going to do.

Bring war material with you from home, but forage on the enemy... use the conquered foe to augment one's own strength.

In war, then, let your great object be victory, not lengthy campaigns.

Know thy self, know thy enemy.

Opportunities multiply as they are seized.

With regard to precipitous heights, if you are beforehand with your adversary, you should occupy the raised and sunny spots, and there wait for him to come up.

Too frequent rewards indicate that the general is at the end of his resources; too frequent punishments that he is in acute distress.