If you know the enemy and know yourself, you need not fear the results of a hundred battles.
If we know that our own men are in a condition to attack, but are unaware that the enemy is not open to attack, we have gone only halfway towards victory.
Hence the saying: If you know the enemy and you know yourself your victory will not stand in doubt, if you now Heaven and you know Earth you may make your victory complete.
Related Quotes to Explore
I have a dream that one day this nation will rise up and live out the true meaning of its creed: "We hold these truths to be self-evident: that all men are created equal."
Whatever course you decide upon, there is always someone to tell you that you are wrong. There are always difficulties arising which tempt you to believe that your critics are right. To map out a course of action and follow it to an end requires courage.