Guilt is a crummy emotion, one that most of us try to avoid, either by not doing things we would be ashamed of (stealing candy, cheating on our spouses) or by rationalizing our actions so that guilt can be safely ignored (I needed a treat; my spouse is mean to me). But guilt is actually a useful, necessary feeling…
Source: LifeHacker – How to Make Your Kid Feel Guilty (in a Good Way)