Continue writing the next sentence in this paragraph:

How to perform a seance
Invite people who believe in the spirit world.
This way the ghost spirits will be more comfortable with wining and dining with people who believe. A seance is much more powerful if everyone there really believes that it's possible to communicate with spirits.
If even just one person is skeptical or thinks the whole thing is silly, the power of the seance will be weakened. A seance is built upon the collective positive energy of the participants, called " sitters, " so make sure everyone you invite is truly on board to have a supernatural experience.