The good news about nightmares is that they are a sign that something powerful has begun to stir within you. A monster can appear in a dream as a representation of your power and how you may find this power frightening. Dream images can take on a Shadow form because we are unwilling to face something difficult or painful. For example, a person who was labeled a black sheep or 'a difficult child' can have two personas active: they can be a successful achiever by day but have unresolved tapes from childhood that undermine their sense of self acceptance or self worth. They may dream of a stalker trying to 'break into their house' (integration with Self) as a representation of this 'vagabond' identity and the need to understand, integrate it and 'let it in.'