“If ignorant both of your enemy and yourself, you are certain to be in peril.”
― Sun Tzu, The Art of War
----
“Anger may in time change to gladness; vexation may be succeeded by content.
But a kingdom that has once been destroyed can never come again into being; nor can the dead ever be brought back to life.”
― Sun Tzu, The Art of War
----
“Rouse him, and learn the principle of his activity or inactivity. Force him to reveal himself, so as to find out his vulnerable spots.”
― Sun Tzu, The Art of War