4738. But this is permitted by the Lord, in order that such spirits may be with those societies, for the sake of infusing opposite things, such as tempt, which the societies ought to shake off - hence, for the sake of strengthening the sphere of truth and good, and extending it. The angels said that they are, also, sometimes observed; and that they sit in corners, and sometimes they appear and sometimes not; and that they cannot be dislodged, before the time of their casting down arrives.