There is no instance of a nation benefiting from prolonged warfare.

If the mind is willing, the flesh could go on and on without many things.

The proximity of an army causes prices to go up; and high prices cause people's substance to be drained away. When their substance is drained away, they will be afflicted by heavy exactions. With this loss of substance and exhaustion of strength, the homes of the people will be stripped bare, and their incomes dissipated.

There is no place where espionage is not possible.

He will win who knows when to fight and when not to fight.

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.

In warfare, there are no constant conditions. He who can modify his tactics in relation to his opponent will succeed and win.