"He who knows when he can fight and when he cannot will be victorious."

"When you are ignorant of the enemy's plans, you cannot prepare for them."

"Do not repeat the tactics which have gained you one victory, but let your methods be regulated by the infinite variety of circumstances."

"Appear at points which the enemy must hasten to defend; march swiftly to places where you are not expected."

"The general who understands the principles of the art of war is the minister of the people's fate and the guardian of the nation's security."