Whilst I'm not religious, there's a definite sense that my daughter is 'possessed' by this idea. Not necessarily like demonic possession but almost like a slave

Whilst I'm not religious, there's a definite sense that my daughter is 'possessed' by this idea. Not necessarily like demonic possession but almost like a slave to this idea as her master. She is a chattel to what started as an idea but has grown into an entity to be obeyed.