Compartmentalization is a form of psychological defense mechanism in which thoughts and feelings that seem to conflict are kept separated or isolated from each other in the mind. Those with post traumatic stress disorder may use compartmentalization to separate positive and negative self aspects. It may be a form of mild dissociation; example scenarios that suggest compartmentalization include acting in an isolated moment in a way that logically defies one's own moral code, or dividing one's unpleasant work duties from one's desires to relax. Its purpose is to avoid cognitive dissonance, or the mental discomfort and anxiety caused by a person having conflicting values, cognitions, emotions, beliefs, etc. within themselves. Compartmentalization allows these conflicting ideas to co-exist by inhibiting direct or explicit acknowledgement and interaction between separate compartmentalized self-states. Psychoanalysis considers that whereas isolation separates thoughts from feeling, compartmentalization separates different (incompatible) cognitions from each other. As a secondary, intellectual defense, it may be linked to rationalization. It is also related to the phenomenon of neurotic typing, whereby everything must be classified into mutually exclusive and watertight categories. It has been said that when thinking about death people end up compartmentalizing, and they are in a mode of denial and acceptance about it, but they both have the result of making the thinking individual very passive. Otto Kernberg has used the term "bridging interventions" for the therapist's attempts to straddle and contain contradictory and compartmentalized components of the patient's mind. Compartmentalization can be positive, negative, and integrated depending on the context and person. Compartmentalization may lead to hidden vulnerabilities related to self-organization and self-esteem in those who use it as a major defense mechanism. When a negative self-aspect is activated, it may cause a drop in self-esteem and mood.