It is more important to outhink your enemy, than to outfight him

Use humility to make the enemy haughty. Tire them by flight. Cause division among them. When they are unprepared, attack and make your move when they do not expect it.

Pretend to be weak, so your enemy may grow arrogant.

He who knows things, and in fighting puts his knowledge into practice, will win his battles. He who knows them not, nor practices them, will surely be defeated.

So it is that good warriors take their stance on ground where they cannot lose, and do not overlook conditions that make an opponent prone to defeat.

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

So there are five ways of knowing who will win. Those who know when to fight and when not to fight are victorious. Those who discern when to use many or few troops are victorious. Those whose upper and lower ranks have the same desire are victorious.