Freud's theories are best understood as covering three key areas: The first is the idea of the importance of unconscious feelings. Freud’s first case studies purported to show the way that when strong feelings cause conflict, they may be blocked from awareness - repressed. This, however, doesn’t mean that they go away. One way they may express themselves is in the form of neurotic symptoms, usually in some way expressing the underlying conflict. As an example, a young woman who was disgusted by seeing a dog drink from a household glass developed symptoms where she couldn’t drink liquids. Unconscious feelings may also show themselves in distorted form in dreams. The goal of Freudian dream interpretation is to unravel the different kinds of distortion which mask the motivations underlying the dream. Freud also thought slips of the tongue and the mistakes we make were motivated by unconscious conflicts and feelings.