My favorite: F × S = k. The product of Freedom and Security is a constant. To gain more freedom of thought and/or action, you must give up some security, and v

My favorite: F × S = k. The product of Freedom and Security is a constant. To gain more freedom of thought and/or action, you must give up some security, and vice versa. These remarks apply to individuals, nations, and civilizations. Notice that the constant k is different for every civilization and different for every individual. --Larry Niven