Frank Mueller

“Know the enemy and know yourself; in a hundred battles you will never be in peril. When you are ignorant of the enemy, but know yourself, your chances of winning or losing are equal. If ignorant both of your enemy and yourself, you are certain in every battle to be in peril.”
― Sun Tzu, The Art of War

“do many calculations lead to victory, and few calculations to defeat”
― Sun Tzu, The Art of War

“Ponder and deliberate before you make a move.”
― Sun Tzu, The Art of War

“Attack is the secret of defense; defense is the planning of an attack.”
― Sun Tzu, The Art of War