|image credit: horror.about.com|
The woman in black is an evil spirit with strong hatred. Her hate is an allegory encoded to show that living people refuse to forgive family members, friends, strangers and others. This hate can manifest in a spirit in the afterlife. Why the woman in black never forgives?
The woman in black is evil. The church preaches to people that they must never allow hate to manifest. We must forgive people to not stoop down to their level. Forgiving is tough act to do since the bad person may have inflicted harm through violence, deception, stealing, betrayal, and other ungodly acts.
Therefore, the woman in black's spirit is unsettled. It is her choice to make the final decision to forgive the town. She echoes that she will never forgive. Her actions killed many children, including Arthur. She wants people to experience her grief. When people lose their children, they must suffer with the pain and grief. They question whether they could have done something differently to prevent the accident.
The woman in black will never forgive. She is an evil parasite, as Elise referred to the old woman in the Insidious movie. Evil spirits enter the deeper astral world, a subplane known as the Avinchi - the seventh dimension. The woman in black is a woman who decided to hate, and then committed the ultimate sin of suicide. Her evil becomes a curse that thrives off hatred.
The woman in black will never forgive. She wants to seek vengeance to create grief. It does not matter if the people are innocent, they live in a cursed land that needs spiritual cleansing to rid it of the evil woman in black. Maybe destroying the home out in the marsh can achieve closure. The woman in black will never forgive unless a living human breaks the curse.