Getting people to fight by letting the force of momentum work is like rolling logs and rocks. Logs and rocks are still when in a secure place, but roll on an incline; they remain stationary if square, they roll if round. Therefore, when people are skillfully led into battle, the momentum is like that of round rocks rolling down a high mountain - this is force.

The sovereign must have full knowledge of the activities of the five sorts of agents. This knowledge must come from the double agents, and therefore it is mandatory that they be treated with the utmost liberality.

Fierce language and pretentious advances are signs that the enemy is about to retreat.

Keep their friends close and their enemies closer.

Build your opponent a golden bridge to retreat across.

Victory is the main object in war.

The enlightened ruler is heedful, and the good general full of caution.