"If your enemy is secure at all points, be prepared for him. If he is in superior strength, evade him."

"Let your plans be dark and impenetrable as night, and when you move, fall like a thunderbolt."

"If the enemy leaves a door open, you must rush in."

"Speed is the essence of war."

"To secure ourselves against defeat lies in our own hands, but the opportunity of defeating the enemy is provided by the enemy himself."