James

“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.”
― Sun Tzu, The Art of War

“A man sees in the world what he carries in his heart.”
― Johann Wolfgang von Goethe, Faust, First Part

“All it takes is one bad day to reduce the sanest man alive to lunacy. That's how far the world is from where I am. Just one bad day.”
― Alan Moore , Batman: The Killing Joke

“The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts.”
― Bertrand Russell