Quote by Qi Jiguang
"All warfare is based on deception and careful observation."
More from Qi Jiguang
"The art of war is of vital importance to the State. It is the means upon which the State depends for its preservation."
"All warfare is based on deception."
"Know yourself and know your enemy; in a hundred battles, you will never be defeated."
"The supreme art of war is to subdue the enemy without fighting."