Fear, like anxiety can be debilitating to a person. Some people who live alone can become very fearful, with endless thoughts turning around and around in the brain without ever really resolving anything. Some people are fearful about the future, of illness, that something awful might happen, and the list goes on and on. Re-living certain fears that were in the past can also render a person into the unable to cope state. It is almost useless to try and convince someone that he or she shouldn't be afraid and that their fear isn't real.
Fear is very real to the person who has it.
The proper choice of homeopathic remedy for fear states will help to quiet the mind and bring about a more tranquil state. To give an example here, there are some people that seem to have an irrational fear that someone is going to break into the house at night, or a robber is hiding in a closet. Before going to bed, they check under the bed furniture, check the closets, make sure that all the doors are securely locked, and still they retire in a fearful state. Usually this type of person wakes up after midnight, or around one o'clock in the morning checking again to see if everything is all right. This type of personality can really benefit from the remedy Arsenicum Album.