Why do mental abusers change dramatically from being nice to being distant and upset?

Mental abusers generally suffer from depression (manic depression in most cases.) They can ride on a high and suddenly hit rock bottom. Generally, they are unaware of it until someone brings it to their attention and even then they meet that person's statement with denial. It's a tough place to be trapped in your body (no excuse for abusing someone) and generally in the toughest cases the person will not reach out for help. Mental abusers are also about control. Although they seem powerful (a need to fear because they are the abuser) they are actually weak. Why? Because they always have to control the environment they are in or they have to control certain situations. They find it difficult to agree to disagree, or to listen and perhaps they might learn something (abusers think they have all the answers for everything). That is why many of these people are often wrongly labeled as narcissistic. In reality, if they searched out psychological help and even were on medications (not always for the rest of their lives) they would simmer down and lead more productive lives. Mental abusers are also very jealous of those around them. They find it difficult to be happy for a family member or friend who has had some luck in their lives. Instead of joining in and celebrating with that family member or friend they will sulk, become sharp tongued or ignore the person completely. If you study a mental abuser you will see they are at their happiest when their environment is level, when they are getting their own way, but, all of us know these good times don't last forever in our lives, so when the luck starts to run out, the mental abuser will become angry, feel as if they are not in control and can even go into rages to try and regain that control. Marcy