Even if we can actually see them, ghosts cannot harm us if we are not afraid of them. However, having fear in mind and thinking that they bring bad luck can, through psychological effect, lead to suffering for oneself or one’s family. Therefore, as soon as one suspects one has seen a ghost, stop and look into mind’s nature, then fear and confusion will disappear immediately, and one will not be bothered by it again.

~ Depicted from "THE HANDBOOK FOR LIFE"S JOURNEY : On The Three Poisons - How to Confront Anger