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

If you know the enemy and know yourself you need not fear the results of a hundred battles.

Hence the saying: If you know the enemy and you know yourself, your victory will not stand in doubt; if you know Heaven and you know Earth, you may make your victory complete.

For to win one hundred victories in one hundred battles is not the acme of skill. To subdue the enemy without fighting is the acme of skill.

For to win one hundred victories in one hundred battles is not the acme of skill. To subdue the enemy without fighting is the acme of skill.

Know thy self, know thy enemy. A thousand battles, a thousand victories.