Allow me to share one simple and very frightening truth with you: your real enemy is someone who knows you. And the better they know you, and the closer they are, the greater their is capacity to do you harm. Total strangers who get a little angry and lose control at sporting events are no real threat, if the proper caution is used. Protective fathers of pretty fourteen-year-old girls will shout and sputter, get loud and use strong language, but in the end they will retreat into their warm houses and leave you alone. But the person who shares a part of your life, who lives with you and knows all your habits and has a keen insight into what you value most is all the world- this is the person to fear.