So do not be too sure that the entity which raps on your table or your cupboard is the spirit of your deceased grandfather. It may be merely a blind and very desirous entity, an eager consciousness, trying to use you to hasten its own evolution, trying to get into you or through you, so as to enjoy the earth and the coarser vibrations of the earth. It may not be able to harm you; but, on the other hand, it may do you a great deal of harm. You had better discourage such attempts to break through the veil which separates you from them; for the veil
