May 1, 2016
“Therefore I say: « Know the enemy and know yourself; in a hundred battles you will never be in peril. When your are ignorant of the enemy but know yourself, your chance of winning or losing are equal. If ignorant both of your enemy and of yourself, you are certain in every battle to be in peril. »”
(The Art of War, Chapter III, Offensive strategy)
Sun Tzu, Chinese strategist (c. 544 BC-c. 496 BCE)
All quotes in the Dictionnary of quotes.