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

Invincibility lies in the defence; the possibility of victory in the attack.

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

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

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

There is no instance of a country having benefited from prolonged warfare.

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