There are numerous passages in the epistles illustrating that demonic spirits can have extensive influence on believers. Paul warns Timothy "the Spirit expressly says that in later times some will depart from the faith by devoting themselves to deceitful spirits and teachings of demons, through the insincerity of liars whose consciences are seared." So in essence we are being told to be careful to what teachings and influences we expose ourselves to. We need to all ask ourselves who is behind these teachings or these realms of influence. The reality is what we expose ourselves to, does influence us and there is a purpose behind this exposure.