"Know your enemy and know yourself and you can fight a hundred battles without disaster."

"The good fighters of old first put themselves beyond the possibility of defeat, and then waited for an opportunity of defeating the enemy."

"If you know the enemy and know yourself, you need not fear the result of a hundred battles. If you know yourself but not the enemy, for every victory gained you will also suffer a defeat. If you know …"

"Hence that general is skillful in attack whose opponent does not know what to defend; and he is skillful in defense whose opponent does not know what to attack."

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