Why is most paranormal activity imperceptible to human senses?
Due to their ethereal nature, spirits often seem intangible and evil. We fear that which we cannot see. The unknown exists all around us but our minds and senses cannot perceive it. We capture only glimpses with our senses. There are numerous energy fields that oscillate at a frequency our mind cannot comprehend nor process. It is very rare indeed to witness a full-bodied apparition or make direct contact but that is the goal of every paranormal investigator.