The substance (matter) of the astral plane, of its energies and “operating system” is defined as Emotion. Whenever and however we experience what we know as emotion (feeling, love, desire, affection, ambition, gratitude, etc.) our astral body and the astral world are the field of action. Emotion is the energy "powering" most intentional psychic and magical operations, the energy responsible for many types of psychic phenomena, possibly including hauntings, poltergeists, rapping, etc.