Contemporary art curator. Student. Book addict. Art lover. Geek. Dreamer. Curious about everything. Check out my website http://thecuriouscurator.com/
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 neither the enemy nor yourself, you will succumb in every battle.
Appear weak when you are strong, and strong when you are weak.
A book that is still relevant today, 2500 years after it appeared, and not only in warfare - many of the guidelines can be applied to other parts of human life. Still, when it comes to war, it's interesting to see that a lot of modern generals were heavily influenced by this book, and also to see how the evolution of technology turned traditional warfare on its head.
A recommended read, even if it's only to understand history a little better.